2003 GMC Sierra Exhausts

    • MagnaFlow® - Street Series Exhaust System
      GMC Sierra 78.0" Bed 2003, Street Series 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 note, making a...
      Our price: $642.41 - $725.16$642.41
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    • Flowmaster® - American Thunder™ Exhaust System
      GMC Sierra 2003, American Thunder™ Exhaust System by Flowmaster®. American Thunder gives you the classic aggressive or moderate sound (depends on application and exhaust type) of a Flowmaster chambered exhaust, which is the classic sound of...
      Our price: $380.76 - $799.90$380.76
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    • Flowmaster® - Force II™ Cat-Back Exhaust System
      GMC Sierra 2003, Force II™ 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 street driving. The character...
      Our price: $352.99 - $666.66$352.99
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    • Borla® - Stainless Steel Cat-Back Exhaust System
      GMC Sierra 4WD Short Bed 2003, 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 and...
      Our price: $500.36 - $947.42$500.36
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    • Corsa® - Sport Stainless Steel Cat-Back Exhaust System
      GMC Sierra 6.0L 2003, Sport Polished Stainless Steel Cat-Back Exhaust System by Corsa®, Single Side Exit with 4" Twin Pro-Series Side Swept Tips. The patented Reflective Sound Cancellation (RSC) technology provides a unique combination of Robust...
      Our price: $862.50 - $960.72$862.50
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    • dB® - Sport Stainless Steel Cat-Back Exhaust System
      GMC Sierra 2003, 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 irritating interior...
      Our price: $638.61 - $808.90$638.61
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    • Gibson® - Swept Side™ Exhaust System
      GMC Sierra 2500 HD Diesel 2003, Swept Side™ Exhaust System by Gibson®. 4" Tubing. Behind Rear Tire Exit. 4" Inlet / 5" Outlet Polished Stainless Round Slash Cut Tip. Get increased exhaust flow for more torque and horsepower with this Swept Side...
      Our price: $364.92 - $575.18$364.92
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    • Gibson® - Swept Side™ Cat-Back Exhaust System
      GMC Sierra 2003, Swept Side™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. Behind Rear Tire Exit. Get increased horsepower and torque in the rpm range where you need it most, with this Swept Side Cat-Back Exhaust System. This Gibson...
      Our price: $291.79 - $505.12$291.79
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    • Gibson® - Dual Sport™ Cat-Back Exhaust System
      GMC Sierra 2003, Dual Sport™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. Behind Rear Tire Exit. 2.5" Inlet / 3.5" Outlet Polished Stainless Round Slash Cut Tip. Get increased horsepower and torque in the rpm range where you need it...
      Our price: $351.13 - $542.89$351.13
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    • Gibson® - Split Rear™ Cat-Back Exhaust System
      GMC Sierra 2003, Split Rear™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE THROATY SOUND. Straight Out The Back Exit. 2.5" Inlet / 3.5" Outlet Polished Stainless Round Slash Cut Tip. Get increased horsepower and torque in the rpm range where...
      Our price: $351.13 - $542.89$351.13
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    • Gibson® - Extreme Dual™ Cat-Back Exhaust System
      GMC Sierra 2003, Extreme Dual™ Cat-Back Exhaust System by Gibson®, AGGRESSIVE SOUND. Behind Each Rear Tire Exit. 2.5" Inlet / 3.5" Outlet Polished Stainless Round Slash Cut Tip. When you’re ready to take your truck to the next level, get the...
      Our price: $351.13 - $542.89$351.13
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    • Gibson® - Super Truck™ Cat-Back Exhaust System
      GMC Sierra 1500 2003, Super Truck™ Cat-Back Exhaust System by Gibson®. In Front of Rear Tire Exit. 6" x 2.75" Outlet Polished Stainless Oblong Slash Cut Tip. When quiet is the least of your concerns, get the Super Truck Cat-Back Exhaust System,...
      Our price: $291.79 - $325.74$291.79
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    • MBRP® - Installer Series™ Cat-Back Exhaust System
      GMC Sierra Short Bed 2003, Installer Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. The Installer Series from MBRP brings you the best in high-quality construction: these reasonably-priced systems are manufactured on the same tooling...
      Our price: $329.99 - $479.99$329.99
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    • MBRP® - Pro Series™ Cat-Back Exhaust System
      GMC Sierra Short Bed 2003, Pro Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND, and Stainless Steel Angled Rolled Edge Tips. The PRO Series exhausts from MBRP is for the no-compromise enthusiast who insists on nothing but the best. For...
      Our price: $699.99 - $805.99$699.99
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    • MBRP® - XP Series™ Cat-Back Exhaust System
      GMC Sierra Short Bed 2003, XP Series™ Cat-Back Exhaust System by MBRP®, MODERATE SOUND. 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 at it and last....
      Our price: $454.99 - $524.99$454.99
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    • MBRP® - Installer Series™ Down Pipe-Back Exhaust System with Stack System
      GMC Sierra 2500 HD / 3500 Duramax 2003, Installer Series™ Down Pipe-Back Exhaust System with Dual Smokers™ Stack Kit by MBRP®, MODERATE SOUND. Give your pickup some of that big-rig flavor with a set of SMOKERS. Nothing rumbles down the street...
      Our price: $454.99 - $804.99$454.99
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    • MBRP® - XP Series™ Down Pipe-Back Exhaust System with Stack System
      GMC Sierra 2500 HD / 3500 Duramax 6.6L 2003, XP Series™ Down Pipe-Back Exhaust System with by MBRP®, MODERATE SOUND. Give your pickup some of that big-rig flavor with a set of SMOKERS. Nothing rumbles down the street like a set of stacks on a...
      Our price: $464.99 - $979.99$464.99
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    • Banks® - Monster™ Cat-Back Exhaust System
      GMC Sierra Extended Cab 4.3L / 5.3L Short Bed 2003, Monster™ Cat-Back Exhaust System by Banks®, 6"-5" Angle-Cut Rolled-Edge Tailpipe Tip, Y-pipe, 3" Muffler. You'll appreciate the Monster Muffler's polished stainless finish and authoritative...
      Our price: $472.77$472.77
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    • CGS® - Cat-Back Exhaust System
      GMC Sierra Short Bed 2003, 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 replacement lifetime...
      Our price: $314.25 - $547.50$314.25
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    • aFe® - Mach Force XP Exhaust System
      GMC Sierra 2003, 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 system for...
      Our price: $449.00 - $599.00$449.00
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    • aFe® - Large Bore HD Exhaust System
      GMC Sierra 6.6L Turbocharged 2003, Large Bore HD Exhaust System by aFe®. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Large Bore HD Exhaust System. aFe dyno tests...
      Our price: $549.00 - $575.00$549.00
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    • aFe® - ATLAS Down-Pipe Back Exhaust System
      GMC Sierra 2500 HD / 3500 HD / 3500 6.6L LB7 / LLY / LBZ 2003, 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...
      Our price: $329.00 - $499.00$329.00
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    • DynoMax® - Super Turbo™ Cat-Back Exhaust System
      GMC Sierra 2003, Super Turbo™ Cat-Back Exhaust System by DynoMax®. Stainless Steel. Aluminized. Dyno proven to flow up to 70 SCFM. Get improved exhaust flow and reduced back pressure for better performance, and a mellow performance exhaust tone...
      Our price: $361.39 - $382.99$361.39
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    • DynoMax® - Ultra Flo™ Welded Cat-Back Exhaust System
      GMC Sierra 2003, Ultra Flo™ Welded Cat-Back Exhaust System by DynoMax®. Stainless Steel. Bare. Band. Dyno proven to flow up to 2,00 SCFM and support up to 2,00 horsepower. This cat-back exhaust system includes pipes, clamps,
      Our price: $355.48 - $383.24$355.48
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    • DynoMax® - Ultra Flo™ Welded Turbo-Back Exhaust System
      GMC Sierra Crew Cab Diesel 2003, Ultra Flo™ Welded Turbo-Back Exhaust System by DynoMax®. Stainless Steel. Bare. Single. Band. Pipe D: 4.00". OD: 5.00". Angle Exit. Turbo Back System. Dyno proven to flow up to 2,00 SCFM and support up to 2,00...
      Our price: $503.49$503.49
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    • DynoMax® - VT™ Cat-Back Exhaust System
      GMC Sierra 1500 Extended Cab 2003, VT™ Cat-Back Exhaust System by DynoMax®. Stainless Steel. Bare. Single. U-Bolt. Pipe D: 3.00". OD: 3.00". Angle Exit. 90 day performance guarantee. This cat-back exhaust system includes pipes, clamps, tip, and...
      Our price: $389.95$389.95
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    • Diamond Eye® - Exhaust System Kit
      GMC Sierra 2003, 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 competition for maximum performance. The...
      Our price: $237.82 - $526.72$237.82
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    • MagnaFlow® - MagnaFlow Series Exhaust System
      GMC Sierra 6.6L 2003, MagnaFlow Series Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. These premium line exhaust systems for diesels without particulate filters include mandrel-bent stainless steel tubing, polished 100% stainless...
      Our price: $587.16 - $926.71$587.16
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    • MagnaFlow® - Off-Road Pro Series Exhaust System
      GMC Sierra Crew Cab 6.6L 2003, Off-Road Pro Series 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, lowered, air bagged or long...
      Our price: $338.53 - $365.47$338.53
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    • MagnaFlow® - XL Series Exhaust System
      GMC Sierra 6.6L 2003, XL Series Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. These mid-level exhaust systems for diesels without particulate filters feature 100% stainless steel satin finish mufflers and mandrel-bent stainless...
      Our price: $539.06 - $878.60$539.06
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    • MagnaFlow® - Pro Series Exhaust System
      GMC Sierra 6.6L 2003, Pro Series 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 tubing. Optional 5"...
      Our price: $299.99 - $792.03$299.99
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    • MagnaFlow® - Black Series Exhaust System
      GMC Sierra 6.6L 2003, Black Series 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% stainless steel mufflers,...
      Our price: $673.74 - $1,090.25$673.74
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    • MagnaFlow® - Custom Builder Exhaust System
      GMC Sierra 6.6L 2003, Custom Builder Exhaust System by MagnaFlow®, MODERATE TO AGGRESSIVE SOUND. Whether you're a professional custom truck builder or building your own dream in your home garage, the Custom Builder Kit is the perfect choice for...
      Our price: $279.99 - $715.06$279.99
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    • Borla® - Stainless Steel Cat-Back Exhaust System
      GMC Sierra 6.6L 2003, Stainless Steel Cat-Back Exhaust System by Borla®, AGGRESSIVE SOUND, Truck Side Exit. 14" Tip. 4" Tubing. Now you can get the best performing, longest lasting exhaust system for your Diesel powered truck, Borla! For maximum...
      Our price: $735.74$735.74
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    • dB® - Sport Stainless Steel Cat-Back Diesel Exhaust System
      GMC Sierra 2500 HD 6.6L 2003, Sport Polished Stainless Steel Cat-Back Diesel Exhaust System by dB®, Single Side Exit, with 5" Slash Cut Tip. The dB exhaust systems are unique in their combination of an aggressive, growling exterior sound and...
      Our price: $803.25 - $851.45$803.25
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    • MBRP® - Black Series™ Down Pipe-Back Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax Crew Cab / Extended Cab 2003, Black Series™ Down Pipe-Back Diesel Off-Road Exhaust System by MBRP®, MODERATE SOUND, Single Side Exit. Black is the new chrome, they say. And it’s hard to argue with the...
      Our price: $629.99 - $799.99$629.99
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    • MBRP® - Installer Series™ Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax Crew Cab / Extended Cab 2003, Installer Series™ Diesel Exhaust System by MBRP®, MODERATE SOUND. Outfit your diesel pickup with a high-flow DPF (Diesel Particulate Filter - Back) exhaust system. You’ll gain...
      Our price: $379.99 - $684.99$379.99
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    • MBRP® - Performance Series™ Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax Crew Cab / Extended Cab 2003, Performance Series™ Diesel Exhaust System by MBRP®, MODERATE SOUND, Single Side Exit. Get more out of your turbodiesel pickup with a Performance Series exhaust system from MBRP....
      Our price: $319.99$319.99
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    • MBRP® - PLM Series™ Diesel Exhaust System
      GMC Sierra Duramax 2003, PLM Series™ Off-Road Diesel Exhaust System by MBRP®, MODERATE SOUND, without Muffler, Single Side Exit. Sometimes you just have to let it all hang out. That’s why MBRP makes race-only exhaust systems. With no...
      Our price: $276.79 - $444.26$276.79
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    • MBRP® - Pro Series™ Cat-Back Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax Crew Cab / Extended Cab 2003, Pro Series™ Cat-Back Diesel Exhaust System by MBRP®, MODERATE SOUND, 4" Tubing, Single Side Exit, and T-5051 Stainless Steel Angled Rolled End Tip. MBRP’s Pro Series exhausts are...
      Our price: $769.99$769.99
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    • MBRP® - SLM Series™ Down Pipe-Back Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax 2003, SLM Series™ Down Pipe-Back Diesel Off-Road Exhaust System by MBRP®, MODERATE SOUND, without Muffler. MBRP’s SLM Series is the ultimate in free-flowing exhaust systems, because they replace both the...
      Our price: $491.47 - $573.64$491.47
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    • MBRP® - TD Series™ Down Pipe-Back Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax 2003, TD Series™ Down Pipe-Back Diesel Off-Road Exhaust System by MBRP®, MODERATE SOUND, Single Rear Turn Down Exit. Guarantee the best performance from your diesel engine by hanging a 5" TD Series...
      Our price: $539.99 - $659.99$539.99
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    • MBRP® - XP Series™ Diesel Exhaust System
      GMC Sierra 2500 HD / 3500 Duramax Crew Cab / Extended Cab 2003, XP Series™ Diesel Exhaust System by MBRP®, MODERATE SOUND. Guarantee the best performance from your diesel engine by hanging this low-backpressure turbo-back system. Crafted of...
      Our price: $504.99 - $924.99$504.99
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    • Flowmaster® - Scavenger Series Elite Headers
      GMC Sierra 2003, Scavenger Series Elite Headers by Flowmaster®. Replace your restrictive factory exhaust manifolds with these stainless steel headers and let your engine breath! Their long tube design will unleash the power that’s hidden in...
      Our price: $669.00$669.00
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    • Borla® - Stainless Steel Header
      GMC Sierra 2003, Stainless Steel Header by Borla®. 304 stainless steel for long life. Connects to the factory mid-pipe. Mandrel-bent for smooth curves. Million Mile warranty.
      Our price: $848.32$848.32
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    • Gibson® - Performance Header
      GMC Sierra 2003, 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 restrictive factory exhaust manifolds. The increased...
      Our price: $358.77 - $494.60$358.77
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    • Banks® - TorqueTube™ Exhaust Manifold System
      GMC Sierra 2003, TorqueTube™ Exhaust Manifold System by Banks®, w/o Air Injection. Cast OEM exhaust manifolds just are too restrictive. Replacing them with Banks Torque Tubes will substantially reduce the backpressure where it counts, right at...
      Our price: $586.07$586.07
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    • BBK® - CNC-Series™ Headers
      GMC Sierra 2003, CNC-Series™ Headers 1.75" Diameter by BBK Performance®. 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 designed with a...
      Our price: $349.99 - $449.99$349.99
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    • Flowmaster® - Super 40 Series Delta Flow™ Muffler
      GMC Sierra 4.8L / 5.3L 2003, 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 40 Series Delta...
      Our price: $89.99$89.99
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    • Flowmaster® - 70 Series Delta Flow™ Diesel Big Block Muffler
      GMC Sierra 3500 6.6L Diesel 2003, 70 Series Delta Flow™ Aluminized Steel Big Block Muffler by Flowmaster®, MILD SOUND, 3" Offset Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 22" Case Length x 28" Overall Length. The 70 Series Big Block II...
      Our price: $144.99$144.99
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    • Flowmaster® - Super 50 Series Delta Flow™ (SUV) Diesel Performance Muffler
      GMC Sierra Diesel 2003, Super 50 Series Delta Flow™ (SUV) Aluminized Steel Diesel Performance Muffler by Flowmaster®, MILD SOUND, 3" Offset Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 17" Case Length x 23" Overall Length. The Super 50 is...
      Our price: $129.99$129.99
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    • Flowmaster® - 50 Series Big Block™ Muffler
      GMC Sierra 2003, 50 Series Big Block™ Aluminized Steel Muffler by Flowmaster®, MILD SOUND, 3" Dual Inlet / 3.5" Offset Outlet, 5" Thick x 12" Wide x 22" Case Length x 28" Overall Length. The 50 Series Big Block Muffler is Flowmaster’s largest...
      Our price: $182.99$182.99
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    • Flowmaster® - 50 Series HD Delta Flow™ Muffler
      GMC Sierra 6.6L 2003, 50 Series HD Delta Flow™ Muffler by Flowmaster®, MODERATE SOUND, 3.5" Offset Inlet / 3.5" Offset Outlet. This is the ideal muffler for Camaros and Firebirds, providing true dual exhaust performance while fitting in the...
      Our price: $149.00 - $154.99$149.00
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    • Flowmaster® - 70 Series Delta Flow™ Big Block Muffler
      GMC Sierra 4.8L / 5.3L 2003, 70 Series Delta Flow™ Big Block Muffler by Flowmaster®, MILD SOUND, 3" Center Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 22" Case Length x 28" Overall Length. The 70 Series Big Block II Muffler uses...
      Our price: $144.99 - $149.48$144.99
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    • Flowmaster® - Super 50 Series Delta Flow™ (SUV) Performance Muffler
      GMC Sierra 4.8L / 5.3L 2003, 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 suitable for everyday...
      Our price: $129.99 - $131.31$129.99
      20% OFF
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    • Flowmaster® - Super 40 Series Delta Flow™ Stainless Steel Diesel Muffler
      GMC Sierra Diesel 2003, Super 40 Series Delta Flow™ Stainless Steel Diesel Muffler by Flowmaster®, AGGRESSIVE SOUND, 3" Offset Inlet / 3" Offset Outlet, 5" Thick x 10" Wide x 13.50" Case Length x 19.50" Overall Length. The Super 40 Series Delta...
      Our price: $90.90$90.90
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    • Flowmaster® - Pro Series™ Stainless Steel Laminar Flow Muffler
      GMC Sierra 6.6L 2003, Pro Series™ Stainless Steel Laminar Flow Muffler by Flowmaster®, MODERATE SOUND, 3.5" Center Inlet / 3.5" Center Outlet. PRO Laminar Flow mufflers have a patented core design that is characterized by efficient exhaust...
      Our price: $169.99$169.99
      20% OFF
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    • Flowmaster® - Scavenger Series Outlaw II Race Collector Muffler
      Universal Scavenger Series Outlaw II Race Collector Muffler by Flowmaster®. These Delta Force Mufflers are designed to attach directly to the exhaust header primary tubes, replacing the collector in sprint and drag racing applications. They are...
      Our price: $179.00 - $199.00$179.00
      20% OFF
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    • dB® - Sport Stainless Steel Diesel Muffler
      GMC Sierra 2500 HD / 3500 6.6L 2003, Sport Polished Stainless Steel Diesel Muffler by dB®, 4.00" Center Inlet / 4.00" Center Outlet, 9.62" Wide x 23.25" Case Length x 27.50" Overall Length. The patented RSC mufflers feature a unique combination...
      Our price: $398.41$398.41
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    • Banks® - Monster™ Stainless Steel Round Muffler
      GMC Sierra 6.6L 2003, 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 torque from...
      Our price: $275.61$275.61
      20% OFF
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    Customer Reviews
    5(5)
    2003 GMC Sierra
    Posted by

    "I've been working a lot lately, so the box is still sitting in the garage. Hope, I'll have some time this weekend. The service was great. The transaction and delivery went really smooth and the system was shipped as promised. I'm definitely going to be a return customer."

    In 2003 GMC Sierra was available in the following models:
    Sierra 1500 • Sierra 1500 HD • Sierra 2500 • Sierra 2500 HD • Sierra 3500 and submodels: Base • SL • SLE • SLT • WT