2008 GMC Sierra Performance Exhaust Systems

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    • Flowmaster® American Thunder™ Dual Cat-Back Exhaust System
      (0 reviews)
      # 23516675
      GMC Sierra 1500 4.8L / 5.3L 2008, American Thunder™ Dual Cat-Back Exhaust System by Flowmaster®. American Thunder gives you the classic AGGRESSIVE or MODERATE sound (depends on application and exhaust type) of a Flowmaster...
      Available sound levels: Aggressive Sound / Moderate Sound (depends on application and exhaust typeIncreases Power
      $524.68 - $723.04
    • Flowmaster® Force II™ Exhaust System
      (0 reviews)
      # 28760735
      GMC Sierra 2008, Force II™ Stainless Steel Exhaust System by Flowmaster®. The Force II Series is designed for a mild, or mild - moderate performance tone experience (depends on application and exhaust type), suitable for everyday...
      Available sound levels: Mild Sound / Mild - Moderate Sound (depends on application and exhaust type)Increases Power
      $471.20 - $701.76
    • MagnaFlow® Street Series Cat-Back Exhaust System
      (0 reviews)
      # 20209672
      GMC Sierra 2008, Street Series Cat-Back Exhaust System by MagnaFlow®, MODERATE SOUND. The Street Series is designed for customers seeking increased performance and better economy, combined with a powerful and well tuned exhaust...
      Moderate SoundDelivers More Horsepower
      $716.11 - $831.67
    • MagnaFlow® Off-Road Pro Series Cat-Back Exhaust System
      (0 reviews)
      # 20209660
      GMC Sierra 4.3L / 4.8L / 5.3L 2008, Off-Road Pro Series Cat-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. The Off Road Pro-Series is designed for use on vehicles with highly modified suspension systems. Lifted,...
      Moderate - Aggressive SoundDesigned for Serious Off Road Racing
      $505.29
    • MagnaFlow® MagnaFlow Series DPF-Back Exhaust System
      (0 reviews)
      # 20209683
      GMC Sierra 6.6L 2008, MagnaFlow Series DPF-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. These premium line exhaust systems for diesels without particulate filters include mandrel-bent stainless steel tubing,...
      Built In Stainless Steel For DurabilityTuned, Powerful Exhaust Sound
      $498.30 - $822.11
    • MagnaFlow® XL Series Stainless Steel DPF-Back Exhaust System
      (0 reviews)
      # 20209700
      GMC Sierra 2500 HD / 3500 HD SLT / WT 6.6L 2008, XL Series Stainless Steel DPF-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. Dual Same Side Behind Passenger Rear Tire Exit. 3.5" / 4" Tubing. 7" x 14" Muffler. 5"...
      $750.07
    • MagnaFlow® Pro Series DPF-Back Exhaust System
      (0 reviews)
      # 20209690
      GMC Sierra 6.6L 2008, Pro Series DPF-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. These entry level performance diesel systems feature 100% stainless steel satin finish mufflers and mandrel-bent stainless steel...
      Moderate - Aggressive SoundBuilt In Aluminized Steel For Durability
      $228.46 - $663.48
    • MagnaFlow® Black Series Filter-Back Exhaust System
      (0 reviews)
      # 20209687
      GMC Sierra 6.6L 2008, Black Series Filter-Back Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. These premium line exhaust systems for diesels with particulate filters include mandrel-bent stainless steel tubing, 100%...
      Moderate - Aggressive SoundBuilt In Stainless Steel For Durability
      $464.04 - $932.86
    • Borla® Touring™ Stainless Steel Cat-Back Exhaust System
      (1 reviews)
      # 58887434
      GMC Sierra 2008, Touring™ Stainless Steel Cat-Back Exhaust System by Borla®, AGGRESSIVE SOUND. When you want the best performing, best sounding, and highest quality exhaust system, you want Borla. Borla straight-through mufflers...
      Mild Growl SoundHorsepower and torque increased by 7 – 10%
      $586.99 - $892.99
    • Gibson® Cat-Back Exhaust System
      (0 reviews)
      # 3734510
      GMC Sierra 2008, Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND., 12" Length. Get increased horsepower and torque in the rpm range where you need it most, with this Swept Side Cat-Back Exhaust System. This Gibson exhaust...
      Less restriction for increased exhaust flowIncrease of 10-15 horsepower and pound feet of torque
      $307.76 - $532.73
    • Gibson® Swept Side™ Cat-Back Diesel Exhaust System
      (0 reviews)
      # 7600498
      GMC Sierra Diesel Long Bed 2008, Swept Side™ Cat-Back Diesel Exhaust System by Gibson®. 4" Tubing. Includes 4" Tailpipe. Flange Connection (To The Converter). Behind Rear Tire Exit. 4" Inlet / 5" Outlet Polished Stainless Round...
      Less restriction for increased exhaust flowIncrease of up to 32 Horsepower and 60 pound feet of torque, depending on application
      $348.19 - $413.64
    • Gibson® Dual Sport™ Cat-Back Exhaust System
      (0 reviews)
      # 3731113
      GMC Sierra 2008, Dual Sport™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. Behind Rear Tire Exit., 12" Length. Get increased horsepower and torque in the rpm range where you need it most, along with dual exhaust tip...
      Increase of 10-15 horsepower and pound feet of torqueDeep, Commanding Exhaust Tone
      $370.34 - $572.58
    • Gibson® Split Rear™ Cat-Back Exhaust System
      (0 reviews)
      # 3732630
      GMC Sierra 2008, Split Rear™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE THROATY SOUND. Straight Out The Back Exit., 12" Length. Get increased horsepower and torque in the rpm range where you need it most, along with the look...
      Increase of 10-15 horsepower and pound feet of torqueAggressive, throaty exhaust tone
      $370.34 - $572.58
    • Gibson® Extreme Dual™ Cat-Back Exhaust System
      (0 reviews)
      # 3731776
      GMC Sierra 2008, Extreme Dual™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. Behind Each Rear Tire Exit., 12" Length. When you’re ready to take your truck to the next level, get the Dual Extreme Cat-Back Exhaust System,...
      Dyno tuned for each applicationLess restriction for increased exhaust flow
      $370.34 - $572.58
    • Gibson® Metal Mulisha™ Stainless Steel Cat-Back Diesel Exhaust System
      (0 reviews)
      # 58237498
      GMC Sierra 6.6L Long Bed 2008, Metal Mulisha™ Cat-Back Diesel Exhaust System by Gibson®, AGGRESSIVE SOUND. 4" Tubing. without Muffler. Passenger Side Behind Rear Tire Exit. 5" Inlet / 8" Outlet Black Ceramic Round Rolled Edge...
      Constructed for maximum horsepower and torque gainMandrel bent pipes provide improved exhaust flow
      $442.79
    • Gibson® Metal Mulisha™ Stainless Steel Cat-Back Exhaust System
      (0 reviews)
      # 58237497
      GMC Sierra 4.8L / 5.3L 2nd Generation with AFM Short Bed / Standard Bed 2008, Metal Mulisha™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. 4" Tubing. Passenger Side Behind Rear Tire Exit. 4" Inlet / 6" Outlet Black...
      Creates a deep, aggressive toneConstructed for maximum horsepower and torque gain
      $442.79
    • Gibson® Super Truck™ Cat-Back Exhaust System
      (0 reviews)
      # 3733021
      GMC Sierra 4.8L / 5.3L 2nd Generation with AFM Short Bed / Standard Bed 2008, Super Truck™ Cat-Back Exhaust System by Gibson®. 2.5" Tubing. Includes Superflow™ Muffler. In Front of Rear Tire Exit. 2" Inlet / 6" x 2.75" Outlet...
      Increase of 15-20 HorsepowerLoud Performance Exhaust Tone; may exceed 95 decibels
      $307.76 - $343.55
    • Corsa® Cat-Back Exhaust System
      (0 reviews)
      # 1520690
      GMC Sierra 4.8L / 5.3L 143.5" Wheelbase 2008, Cat-Back Exhaust System by Corsa®. 3" Tubing. The patented Reflective Sound Cancellation (RFC) technology provides a unique combination of a Reserved, Distinctive Performance Sound on...
      Reserved but Distinctive Performance ToneStraight-Through Nonrestrictive Design for Improved Performance and Fuel Economy
      $958.26 - $1,285.58
    • MBRP® Black Series™ Filter-Back Diesel Exhaust System
      (0 reviews)
      # 3695937
      GMC Sierra 2500 HD / 3500 HD Duramax LMM 2008, Black Series™ Filter-Back Diesel Exhaust System by MBRP®, MODERATE SOUND, 4" Tubing, Single Side Exit, and T-5051 Stainless Steel Angled Rolled End Tip. Black is the new chrome, they...
      Mellow, authoritative exhaust note16 GA aluminized steel construction
      $394.99
    • MBRP® Installer Series™ Cat-Back Exhaust System
      (1 reviews)
      # 3694687
      GMC Sierra 2008, Installer Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. 3" Tubing. The Installer Series from MBRP brings you the best in high-quality construction: these reasonably-priced systems are manufactured on...
      Boosts horsepower and torqueMellow, authoritative exhaust note
      $339.99 - $439.99
    • MBRP® Installer Series™ Filter-Back Diesel Exhaust System
      (0 reviews)
      # 3695439
      GMC Sierra 2500 HD / 3500 HD Duramax LMM 2008, Installer Series™ Filter-Back Diesel Exhaust System by MBRP®, MODERATE SOUND. Built from heavy duty aluminized steel Installer Series performance exhaust systems offer a value price...
      Mandrel-bent constant-diameter tubingMellow, authoritative exhaust note
      $294.99 - $534.99
    • MBRP® Installer Series™ Filter-Back Diesel Exhaust System with Turbo Down Pipe
      (0 reviews)
      # 10609348
      GMC Sierra 2500 HD / 3500 HD 6.6L 2008, Installer Series™ Filter-Back Diesel Exhaust System with Turbo Down Pipe by MBRP®, MODERATE SOUND, Single Side Exit. Built from heavy duty aluminized steel Installer Series performance...
      Mandrel-bent constant-diameter tubingMellow, authoritative exhaust note
      $399.99 - $504.99
    • MBRP® Installer Series™ Filter-Back Exhaust System
      (0 reviews)
      # 54453727
      GMC Sierra 2008, Installer Series™ Filter-Back Exhaust System by MBRP®, MODERATE SOUND. 4" Tubing. Dual Outlet Single Side Exit. Built from heavy duty aluminized steel Installer Series performance exhaust systems offer a value...
      Mandrel-bent constant-diameter tubingMellow, authoritative exhaust note
      $444.99 - $504.99
    • MBRP® Pro Series™ Cat-Back Exhaust System
      (0 reviews)
      # 3694484
      GMC Sierra 1500 2008, Pro Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. The PRO Series exhausts from MBRP is for the no-compromise enthusiast who insists on nothing but the best. For you, that means a system...
      $714.99
    • MBRP® Pro Series™ Stainless Steel Filter-Back Exhaust System
      (0 reviews)
      # 54453405
      GMC Sierra 2008, Pro Series™ Stainless Steel Filter-Back Exhaust System by MBRP®, MODERATE SOUND. 4" Tubing. Dual Outlet Single Side Exit. MBRP's Pro Series is the best performance exhaust system that money can buy. It is a...
      Mellow, authoritative exhaust noteMirror-polished T304 stainless tips and mufflers
      $604.99
    • MBRP® XP Series™ Cat-Back Exhaust System
      (0 reviews)
      # 3694945
      GMC Sierra 2008, XP Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. 3" Tubing. The XP series exhausts from MBRP is for the no-compromise enthusiast who insists on a rugged system that can take whatever the road throws...
      Mellow, authoritative exhaust noteConstructed entirely of T409 stainless steel
      $464.99 - $539.99
    • MBRP® TD Series™ Filter-Back Diesel Exhaust System
      (0 reviews)
      # 3695970
      GMC Sierra 2500 HD / 3500 HD Duramax 2008, TD Series™ Filter-Back Diesel Exhaust System by MBRP®, MODERATE SOUND, 4" Tubing, Single Rear Turn Down Exit, and T-5051 Stainless Steel Angled Rolled End Tip. Guarantee the best...
      Deletes catalytic converterCompetition only
      $309.99
    • MBRP® Performance Series™ Cat-Back Exhaust System
      (0 reviews)
      # 36201055
      GMC Sierra 4.8L / 5.3L Extended Cab / Crew Cab Short Bed 2008, Performance Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. 3" Tubing. Single Side Exit. Get more out of your turbodiesel pickup with a Performance Series...
      Authoritative exhaust noteSingle side exit behind passenger-side rear tire
      $299.99
    • Banks® Monster™ Exhaust System
      (0 reviews)
      # 45909438
      GMC Sierra 2008, Monster™ Exhaust System by Banks®. Improve performance and economy with a Banks Monster Exhaust system. Increased pipe size is only part of it. Banks uses constant-diameter mandrel bending to keep their stainless...
      Large-diameter stainless steel pipes and muffler6" x 5" polished 304 stainless exhaust tip
      $359.47 - $946.97
    • Banks® Monster™ DPF-Back Diesel Exhaust System
      (0 reviews)
      # 45905485
      GMC Sierra Extended Cab Diesel 78.7" Bed 2008, Monster™ DPF-Back Diesel Exhaust System by Banks®, Single Side Exit. Includes 6"-5" Angle-Cut Rolled-Edge Tailpipe Tip. 100% stainless constant-diameter 4" system for diesel vehicles...
      4" stainless constant-diameter pipe outflows stock systemCoolCuff design keeps exhaust temperatures low
      $359.47
    • Banks® PowerPack™ Exhaust System
      (0 reviews)
      # 46432702
      GMC Sierra 1500 2008, PowerPack™ Exhaust System by Banks®. Improve performance and economy with a Banks Monster Exhaust system. Increased pipe size is only part of it. Banks uses constant-diameter mandrel bending to keep their...
      $1,828.45 - $2,292.35
    • Banks® Six-Gun™ Dual Exhaust System
      (0 reviews)
      # 46432720
      GMC Sierra Diesel 2008, Six-Gun™ Dual Exhaust System by Banks®. The Banks Power Six-Gun Bundle Dual Exhaust System is the best performance package on a budget. Six-Gun Bundle is a total engineered power system for sport and...
      $2,241.27
    • Banks® Six-Gun™ Single Exhaust System
      (0 reviews)
      # 46432723
      GMC Sierra Diesel 2008, Six-Gun™ Single Exhaust System by Banks®. Everything in it is engineered to work together to maximize your engine's power, efficiency and durability. Banks Six-Gun Bundle honors your vehicle by safely...
      $1,901.38
    • Banks® Stinger™ Exhaust System
      (0 reviews)
      # 46432707
      GMC Sierra 2008, Stinger™ Exhaust System by Banks®. With its engineered exhaust, intake and fuel management upgrades, economical Stinger adds impressive power, efficiency and durability—and sounds great doing it! The Banks...
      $1,242.38 - $2,241.27
    • dB® Sport Stainless Steel Cat-Back Exhaust System
      (1 reviews)
      # 901956
      GMC Sierra 2008, Sport Polished Stainless Steel Cat-Back Exhaust System by dB®, with 4" Slash Cut Polished Tip. The dB exhaust systems are unique in their combination of an aggressive, growling exterior sound and absence of...
      $574.75 - $728.01
    • CGS® Cat-Back Exhaust System
      (0 reviews)
      # 1465562
      GMC Sierra Short Bed 2008, Cat-Back Exhaust System by CGS®. Get more power, improved performance, increased mileage and throaty sound in a bolt-on package. With the CGS Cat-Back Exhaust System you get all this and a complete...
      Dyno proven gains in horsepower and torqueImproved performance
      $314.25 - $464.25
    • RBP® Power Series Cat-Back Exhaust System
      (0 reviews)
      # 42554336
      GMC Sierra 2008, Power Series Cat-Back Exhaust System by RBP®. RBP's Cat-Back exhaust system is made of mandrel-bent stainless steel tubing. The system includes all parts of the exhaust system behind the catalytic converter. It is...
      Made in Stainless Steel for DurabilityLowers Exhaust Gas Temperature
      $1,123.20 - $1,252.80
    • RBP® Eliminator Series DPF-Back Exhaust System
      (0 reviews)
      # 42554340
      GMC Sierra Extended Cab / Crew Cab 6.6L 2008, Eliminator Series DPF-Back Exhaust System by RBP®. Exhaust systems for offroad trucks can sometimes be difficult to find. Many offroaders have to resort to custom built systems which...
      Made in Stainless Steel for DurabilityLowers Exhaust Gas Temperature
      $691.20 - $1,036.80
    • RBP® Sport Series DPF-Back Exhaust System
      (0 reviews)
      # 42554344
      GMC Sierra Extended Cab / Crew Cab 6.6L 2008, Sport Series DPF-Back Exhaust System by RBP®. Exhaust systems for offroad trucks can sometimes be difficult to find. Many offroaders have to resort to custom built systems which are...
      Made in Stainless Steel for DurabilityLowers Exhaust Gas Temperature
      $518.40 - $777.60
    • aFe® Mach Force XP Exhaust System
      (0 reviews)
      # 1066977
      GMC Sierra 2008, Mach Force XP Exhaust System by aFe®. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Exhaust System. aFe dyno tests every...
      Up to 29% Greater Exhaust Flow than stock systemIncreases horsepower and torque
      $449.00 - $885.00
    • aFe® ATLAS Down-Pipe Back Exhaust System
      (0 reviews)
      # 6875443
      GMC Sierra 2500 HD / 3500 HD 6.6L LMM 2008, ATLAS Down-Pipe Back Exhaust System by aFe®. The ATLAS Exhaust System channels the exhaust from the engine to the rear of the vehicle on a racing diesel engine truck. It has the least...
      The least restriction for maximum airflowIncreases horsepower and torque
      $345.00 - $495.00
    • DynoMax® Ultra Flo™ Cat-Back Welded Exhaust System
      (0 reviews)
      # 18222935
      GMC Sierra 2008, Ultra Flo™ Cat-Back Welded Exhaust System by DynoMax®. Dyno proven to flow up to 2 SCFM and support up to 2 horsepower. This cat-back exhaust system includes pipes, clamps, tip, and includes the Ultra Flo Welded...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueUltra Flo Welded muffler will give your car a deep performance tone
      $309.31 - $446.85
    • DynoMax® Ultra Flo™ Stainless Steel DPF-Back Welded Exhaust System
      (0 reviews)
      # 18216436
      GMC Sierra 6.6L 2008, Ultra Flo™ Stainless Steel DPF-Back Welded Exhaust System by DynoMax®. Angle Exit. 5" Tubing. 14" Stainless Steel Slant Cut Cooling Tip. Dyno proven to flow up to 2 SCFM and support up to 2 horsepower. 17...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueUltra Flo Welded muffler will give your car a deep performance tone
      $444.74
    • DynoMax® VT™ Cat-Back Exhaust System
      (0 reviews)
      # 18223436
      GMC Sierra 4.8L / 5.3L 2008, VT™ Cat-Back Exhaust System by DynoMax®. Angle Exit. 3" Tubing. With U-Bolt Pipe. This cat-back exhaust system includes pipes, clamps, tip, and revolutionary DynoMax VT performance mufflers that will...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueExclusive DynoMax Valve Technology delivers on-demand, drone-free performance and sound
      $297.41 - $325.17
    • Diamond Eye® Exhaust System Kit
      (0 reviews)
      # 15960498
      GMC Sierra 2500 HD / 3500 HD Diesel 2008, Exhaust System Kit by Diamond Eye Performance®. This products is created for those who are not afraid of the power. It is fine-tuned to deliver unrestricted power and tested against...
      The finest quality at a great priceOE quality parts from top original equipment and aftermarket manufacturers
      $201.53 - $327.49
    • Flowmaster® Scavenger Series Shorty Elite Headers
      (0 reviews)
      # 41955859
      GMC Sierra 1500 4.8L / 5.3L / 6.0L 2008, Scavenger Series Ceramic Coated Shorty Elite Headers by Flowmaster®, 2.5" Outlet. 1.63" Tubing. Includes Bolts and Studs. Replace your restrictive factory exhaust manifolds with these...
      Increases horsepower and torqueImproves engine efficiency and throttle response
      $662.32
    • Gibson® Performance Header
      (1 reviews)
      # 3729194
      GMC Sierra without EGR without Air Injection 2008, Performance Header by Gibson®. Let your engine breathe and gain power and performance with Gibson Performance Headers. These headers will flow much more exhaust than your...
      Increases low and mid-range horsepower and torqueIncreases engine efficiency
      $378.39 - $521.65
    • Banks® TorqueTube™ Exhaust Manifold System
      (0 reviews)
      # 3145707
      GMC Sierra W/O Air Injection 2008, TorqueTube™ Exhaust Manifold System by Banks®. Includes Intake, TransferTube, Air Filter, Filter Housing, Head Shield, Exhaust Manifolds, Y-Pipe, Muffler, Exhaust. Cast OEM exhaust manifolds...
      $586.07
    • BBK® CNC-Series™ Headers with Air Fitting Connectors
      (0 reviews)
      # 55186886
      GMC Sierra 6.0L 2008, CNC-Series™ Headers with Air Fitting Connectors by BBK®. Gain 15-20 dyno-proven horsepower at the rear wheels just by bolting on a set of BBK long tube, full length headers. These premium headers are CAD...
      Dyno testing results show a typical increase of 15-20 horsepower at the rear wheelsDeveloped using CAD (Computer Aided Design) software
      $369.99 - $469.99
    • aFe® Twisted Steel Headers without Catalytic Converters
      (0 reviews)
      # 46178728
      GMC Sierra 1500 4.8L / 5.3L / 6.0L 2008, Twisted Steel Headers without Catalytic Converters by aFe®. The new Twisted Steel performance header from aFe Power is redefining the header industry with the new pulse control technology....
      Optimized Tube Lengths Improve Flow and Performance100% hand MIG-welded construction ensures optimal strength and durability
      $795.00
    • Flowmaster® Direct Fit Stainless Steel Catalytic Converter
      (0 reviews)
      # 34451175
      GMC Sierra 1500 2008, Direct Fit Stainless Steel Catalytic Converter by Flowmaster®, 2.5" Inlet / 3" Outlet. 40" Length. 30" Width. The new Flowmaster replacement catalytic converters are made to meet and exceed all federal...
      Exceed all federal emission standardsStainless Steel shells
      $496.16
    • MagnaFlow® Direct Fit California OBDII Catalytic Converter
      (0 reviews)
      # 62247105
      GMC Sierra 2008, Direct Fit California OBDII Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $1,380.93 - $1,514.91
    • MagnaFlow® Direct Fit Federal OEM Grade Catalytic Converter
      (0 reviews)
      # 61588733
      GMC Sierra 2008, Direct Fit Federal OEM Grade Catalytic Converter by MagnaFlow®. If your car needs replacement, install one that will get you through the smog check and give you more horsepower. This converter will directly replace...
      Increases exhaust flow compared to original factory converterIncreased exhaust flow allows your engine to make more power
      $678.78 - $841.48
    • Bosal® Catalytic Converter
      (0 reviews)
      # 36757633
      GMC Sierra 0 / 3 / C / J / K / X / Y Engine VIN code Federal Emission Standard 2008, Catalytic Converter by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $347.43
    • Flowmaster® 50 Series HD Delta Flow™ Stainless Steel Muffler
      (0 reviews)
      # 34441533
      GMC Sierra 1500 / 2500 HD 6.0L 2008, 50 Series HD Delta Flow™ Stainless Steel Muffler by Flowmaster®, MODERATE SOUND, 3.5" Offset Inlet / 3.5" Offset Outlet, 3" Thick x 10" Wide x 16" Case Length x 22" Overall Length. The 50...
      Built for Quieting Big Displacement EnginesWorks Great with Both Gas and Diesel Applications
      $191.86
    • Flowmaster® Super 40 Series Delta Flow™ Muffler
      (4 reviews)
      # 850549
      GMC Sierra 4.8L / 5.3L 2008, Super 40 Series Delta Flow™ Aluminized Steel Muffler by Flowmaster®, AGGRESSIVE SOUND, 3" Center Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 13.50" Case Length x 19.50" Overall Length. The Super...
      Can Replace Any Other 40-Series MufflerDeeper and Richer Tone than Original 40 Series Muffler
      $94.44
    • Flowmaster® Super 50 Series Delta Flow™ (SUV) Performance Muffler
      (1 reviews)
      # 850612
      GMC Sierra 4.8L / 5.3L 2008, Super 50 Series Delta Flow™ (SUV) Performance Muffler by Flowmaster®, MILD SOUND, 3" Center Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 17" Case Length x 23" Overall Length. The Super 50 is...
      Excellent Choice for Muscle Cars and Street Performance VehiclesThree-Chamber Delta Flow Technology
      $136.40 - $142.98
    • Banks® Monster™ Stainless Steel Round Muffler
      (0 reviews)
      # 26049867
      GMC Sierra 6.6L 2008, Monster™ Stainless Steel Round Muffler by Banks®, 4" Inlet / 4" Outlet Diameter. 19.7" / 8" / 8" Body Length / Width / Height. Single Center Inlet / Single Center Outlet. 10" Wide. Get increased power and...
      $275.61
    • DynoMax® Race Series Muffler
      (0 reviews)
      # 18215762
      GMC Sierra 6.6L 2008, Race Series Muffler by DynoMax®. 5" Inlet / 5" Outlet. 16" Body Length, 6" Body Width, 6" Body Height. CRF Technology which helps provide up to a 4 dbA sound reduction, on most race applications, while...
      Unrestricted, straight-through design for a dyno tested and track proven increase in horsepower and torqueEngineered to provide a deep race sound
      $77.29
    • DynoMax® Ultra Flo™ Muffler
      (0 reviews)
      # 18223336
      GMC Sierra 2008, Ultra Flo™ Muffler by DynoMax®. Dyno proven to flow up to 2 SCFM and support up to 2 horsepower. This muffler features straight-through design for unrestricted exhaust flow and a dyno-proven increase in power. It...
      Unrestricted, straight-through design for a dyno-proven increase in horsepower and torqueEngineered to give your car a deep performance tone
      $115.44 - $127.64



    Guides & Articles
    Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences...
    It has been a battle of the ages to make exhaust sound like it should. Having less bends or turns will not only improve the sound but also performance. A custom exhaust is always an option for the race inspired and spirited weekend warriors. Our manufactures offer everything needed to build a custom exhaust to your preference.
    Headers are installed because the stock exhaust manifolds usually flow poorly. An exhaust header has individual tubes for each exhaust port, allowing each exhaust pulse to flow unobstructed from the cylinder head. The tubes on headers are usually larger in diameter than the runners on an exhaust manifold and the tubes are mandrel bent for gradual radius bends.
    Popular Popular Products

    2008 GMC Sierra Performance Exhaust Systems Reviews
    Average rating: 5 4.8 - 3 reviews
    (5)
    APPEARANCE
    EASE OF INSTALLATION
    PRICE/VALUE
    QUALITY
    Easy Installation!
    2008 GMC Sierra | Posted by Darrell | (Baton Rouge, LA)

    I was looking for some system that will give my vehicle something between crazy sound and moderate one. And I’ve made an excellent choice! The installation is easy. The product was everything that I’ve expected. Good deal!

    Was this review helpful for you? YesNo
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    2008 GMC Sierra Models
    • 2008 GMC Sierra 1500 SL Performance Exhaust Systems
    • 2008 GMC Sierra 1500 SLE Performance Exhaust Systems
    • 2008 GMC Sierra 1500 SLT Performance Exhaust Systems
    • 2008 GMC Sierra 1500 WT Performance Exhaust Systems
    • 2008 GMC Sierra 2500 HD SLE Performance Exhaust Systems
    • 2008 GMC Sierra 2500 HD SLT Performance Exhaust Systems
    • 2008 GMC Sierra 2500 HD WT Performance Exhaust Systems
    • 2008 GMC Sierra 3500 HD SLE Performance Exhaust Systems
    • 2008 GMC Sierra 3500 HD SLT Performance Exhaust Systems
    • 2008 GMC Sierra 3500 HD WT Performance Exhaust Systems