2012 GMC Sierra Performance Headers

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    • (0 reviews)
      # 1022341052
      GMC Sierra 2012, Twisted Steel™ 409 SS Exhaust Headers by aFe®. The new Twisted Steel performance header from aFe Power is redefining the header industry with the new pulse control technology. aFe engineers have designed this header...
      Optimized Tube Lengths Improve Flow and Performance100% Hand MIG-Welded Construction Ensures Optimal Strength and Durability
      $817.94 - $1,616.89
    • (0 reviews)
      # mpn4564002596
      GMC Sierra Regular Cab / Extended Cab / Crew Cab 6.6L 2012, BladeRunner Ductile Iron Exhaust Manifold by aFe®. Replace the exhaust manifold on your Dodge diesel with the BladeRunner manifold. It was created to address a cracking problem...
      Thick wall construction and reinforced ribs for maximum durabilityOutflows the factory exhaust manifolds, improving performance and throttle response
      $517.74
    • (3 reviews)
      # 231112173
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L without Air Injection without EGR System 2012, Performance Short Tube Exhaust Headers by Gibson®. Collector Outlet Diameter: 2.5". Header Style: Short Tube. Let your engine breathe and gain power and...
      Increases low and mid-range horsepower and torqueIncreases engine efficiency
      $454.53 - $597.60
    • (0 reviews)
      # 231283243
      GMC Sierra 2012, Exhaust Manifold by ATP®. Color: Natural. Header Coating: Uncoated. ATP Graywerks Exhaust Manifolds are a high quality OE replacement alternative. Each manifold is developed off of the original parts specifications, to...
      Manufactured to OE design ensuring manifold will line up and flow like the original unitHigh grade metallurgy resists fatigue cracking and breakage
      $63.62 - $110.97
    • (0 reviews)
      # 231099602
      GMC Sierra 2012, Cast Iron Exhaust Manifold by Dorman®. Color: Natural. Header Coating: Uncoated. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
      High Quality tubular construction protects against warping and/or crackingLeak-resistant for long-lasting performance
      $69.95 - $143.95
    • (0 reviews)
      # mpn4564004617
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Exhaust Headers by Advance Adapters®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It...
      High quality at an affordable priceExpertly made from premium materials
      $241.46
    • (0 reviews)
      # 372849506
      GMC Sierra 2012, Steel Long Tube 4-2-1 Tri-Y Exhaust Header Kit with Y-Pipes by Doug Thorley Headers®. Collector Outlet Diameter: 2.5". Header Style: Long Tube. Doug's headers are designed to outflow your stock exhaust manifolds by...
      High quality at an affordable priceExpertly made from premium materials
      $754.00 - $944.00
    • (0 reviews)
      # 308602094
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Steel Short Tube Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. These shortie headers are a fantastic way...
      Street legal in all 50 statesCompact design - great for tight spaces
      $500.00 - $526.00
    • (0 reviews)
      # mpn4564008586
      GMC Sierra 1500 4.8L / 5.3L / 6.0L / 6.2L 2012, SuperMAXX Stainless Steel Long Tube Exhaust Headers by Dynatech®. Primary Tubing Diameter: 1.75". Collector Length: 4.25". Color: Natural. Header Coating: Uncoated. Header Style: Long...
      Perfect, direct bolt-on fitT304 polished stainless steel construction
      $1,029.99
    • (0 reviews)
      # 1200566729
      GMC Sierra 2012, Long Tube Exhaust Headers by Flowtech®. Primary Tubing Diameter: 1.875". Collector Outlet Diameter: 3". Header Material: Mild Steel. Header Style: Long Tube. What happens when you're doing a custom installation, or if...
      Mandrel-formed Power Plenum collectors for low backpressureLong transition collectors with merge spears for maximum flow and increased exhaust velocity
      $320.95 - $586.95
    • (0 reviews)
      # 652336872
      GMC Sierra 2012, Short Tube Exhaust Headers by Flowtech®. Collector Outlet Diameter: 2.5". Header Style: Short Tube. Flowtech’s emissions-friendly headers are just the ticket for those who want the best of both worlds – top...
      This is a 50-State Legal headerSturdy 16 gauge tubing
      $316.95 - $448.95
    • (0 reviews)
      # 221600012
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Cat4ward Stainless Steel Long Tube Exhaust Headers by JBA®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Header Style: Long Tube. JBA long tube headers are the number one...
      3/8' thick CNC laser-cut flangesPatented JBA Firecone® merged collector
      $508.58 - $631.72
    • (0 reviews)
      # 221599943
      GMC Sierra 1500 4.8L / 5.3L / 6.0L / 6.2L without EGR System 2012, Cat4ward Stainless Steel Shorty Exhaust Headers by JBA®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Material: Stainless Steel. Header...
      Mandrel-bent stainless steel primary tubesPatented JBA Firecone® collector
      $488.10 - $629.80
    • (0 reviews)
      # 1200566707
      GMC Sierra 2012, Mild Steel Long Tube Exhaust Headers by PaceSetter®. Collector Outlet Diameter: 3". Header Style: Long Tube. From the leader in the design, manufacture and distribution of affordably priced, quality made performance...
      0.375” thick CNC-machined, port matched steel flanges3” high volume collector
      $275.66 - $495.81
    • (0 reviews)
      # 409418822
      GMC Sierra 2012, Mild Steel Short Tube Exhaust Headers by PaceSetter®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. Flanged Collector. Manufactured using mandrel-bent, 16-gauge mild steel...
      Machined flanges and 16-gauge primaries, just like race long tubesPollution control hook ups
      $244.78 - $394.91
    • (0 reviews)
      # 378622211
      GMC Sierra 4.8L / 6.2L 2012, Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". This superior Patriot Exhaust product is just for you. Carefully designed for maximum performance, is will...
      Expertly crafted from premium materialsQuality design and workmanship
      $413.14 - $605.61
    • (0 reviews)
      # 378621703
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Roadster Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3.5". This superior Patriot EXhaust product is just for you. Carefully designed for...
      Expertly crafted from premium materialsQuality design and workmanship
      +1
      $263.43 - $573.26
    • (0 reviews)
      # 378622284
      GMC Sierra 2012, Steel Long Tube Exhaust Headers by Patriot Exhaust®. Collector Outlet Diameter: 3". Header Style: Long Tube. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will...
      Expertly crafted from premium materialsQuality design and workmanship
      $324.77 - $664.45
    • (0 reviews)
      # 378621689
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Street Rod Sprint Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3.5". This superior Patriot EXhaust product is just for you. Carefully...
      Expertly crafted from premium materialsQuality design and workmanship
      $261.56 - $516.81
    • (0 reviews)
      # 231111565
      GMC Sierra 6.6L 2012, Stainless Steel Exhaust Manifold Clamp by Dorman®. Material: Stainless Steel. Easily repair exhaust leaks without removing broken manifold bolts with Dorman’s Exhaust Manifold to Cylinder Head Repair Clamp. This...
      Direct replacement for a proper fit every timeReplacement restores drivability and proper engine performance
      $26.64 - $53.95
    • (0 reviews)
      # mpn358582413
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Aluminum Header Flange Kit by Moroso®. Material: Aluminum. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso...
      High quality at an affordable priceExpertly made from premium materials
      $118.40
    • (0 reviews)
      # 466681127
      GMC Sierra 2012, 304 SS Collector Flange by Stainless Works®. Material: 304 SS. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with careful...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $45.89
    • (0 reviews)
      # mpn4476219268
      GMC Sierra 6.6L 2012, GM Original Equipment™ Exhaust Manifold Flange Gasket by ACDelco®. Position: Rear. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $9.15
    • (0 reviews)
      # 266668932
      GMC Sierra 2012, GM Original Equipment™ Exhaust Manifold Gasket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $8.88 - $31.97
    • (0 reviews)
      # 1200566692
      GMC Sierra 2012, Exhaust Manifold Gasket Set by DNJ Engine Components®. Get this top-grade quality replacement for your worn out part from DNJ. Expertly crafted from premium materials, this product is of the finest quality to provide...
      Designed to restore your vehicle's original performanceProvides superior sealing performance
      $6.98 - $7.33
    • (1 review)
      # 1022403091
      GMC Sierra 2012, Exhaust Manifold Flange Gasket by Mahle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      High quality at an affordable priceExpertly made from premium materials
      $5.90
    • (1 review)
      # 960336121
      GMC Sierra 2012, Exhaust Manifold Flange Gasket by Mahle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      High quality at an affordable priceExpertly made from premium materials
      $5.90
    • (1 review)
      # mpn260011023
      GMC Sierra Denali 6.0L / 6.2L 2012, Exhaust Manifold Flange Gasket by Mahle®. Position: Driver Side. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
      High quality at an affordable priceExpertly made from premium materials
      $5.90
    • (0 reviews)
      # mpn4486227517
      GMC Sierra 4.3L 2012, Exhaust Manifold Gasket Set by Mahle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...
      High quality at an affordable priceExpertly made from premium materials
      $14.91
    • (0 reviews)
      # 1022378073
      GMC Sierra 2012, Exhaust Pipe to Manifold Gasket by Mahle®. Position: Passenger Side. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind....
      High quality at an affordable priceExpertly made from premium materials
      $6.34 - $14.21
    • (0 reviews)
      # 960601621
      GMC Sierra 2012, Exhaust Pipe to Manifold Gasket by Mahle®. Position: Passenger Side. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind....
      High quality at an affordable priceExpertly made from premium materials
      $6.34 - $14.21
    • (0 reviews)
      # 960295124
      GMC Sierra Denali 2012, Exhaust Pipe to Manifold Gasket by Mahle®. Position: Passenger Side. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
      High quality at an affordable priceExpertly made from premium materials
      $6.34 - $14.21
    • (0 reviews)
      # mpn4483468136
      GMC Sierra 6.6L 2012, 304 SS Exhaust Manifold Gasket Set by PPE®. Material: 304 SS.
      Thoughtfully designed to match your diesel engine needsMade to help enhance the performance of your vehicle
      $19.79
    • (0 reviews)
      # 245516022
      GMC Sierra 2012, Header Gasket by Howe Racing Enterprises®. Designed utilizing the latest technology, this product by Howe Racing Enterprises® features premium quality and will perform better than advertised. Perfect for your vehicle...
      High quality at an affordable priceExpertly made from premium materials
      $12.14
    • (0 reviews)
      # mpn469957889
      GMC Sierra 6.6L 2012, Exhaust Manifold Gasket by Merchant Automotive®.
      High quality at an affordable priceExpertly made from premium materials
      $34.85
    • (0 reviews)
      # 1022191078
      GMC Sierra 4.8L / 5.3L / 6.0L 2012, Graph-Flex™ Exhaust Collector Gasket by Percy's High Performance®. Collector Outlet Diameter: 2.625". Seal your collector flanges properly with gaskets from Persy's High Performance. These metal...
      Metal stainless steel coreMalleable core conforms to gasket flange for leak-free sealing
      $15.04
    • (0 reviews)
      # mpn4483467717
      GMC Sierra 4.3L 2012, Graph-Flex™ Exhaust Header Gaskets by Percy's High Performance®. These durable header flange gaskets are composed of a graphite composition material on a malleable stainless steel core. They’ll seal up tight on...
      Malleable stainless steel metal coreWill survive 2000°F exhaust temperatures for extended periods
      $24.68
    • (0 reviews)
      # 652586865
      GMC Sierra 2012, HTR Collector Gaskets by Percy's High Performance®. This products is an OEM and Performance company that was built on its founding heritage supported by a tradition of Legendary Quality.
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $14.57 - $19.32
    • (0 reviews)
      # 710980590
      GMC Sierra 2012, Seal-4-Good™ Exhaust Header Gaskets by Percy's High Performance®. These extreme high-temperature gaskets are well-suited for highly-modified engines: turbocharged, supercharged, nitrous or fuel. This is a premium,...
      Multi-layered for excellent conformability and sealSeals even imperfect flanges
      $34.22 - $36.14
    • (0 reviews)
      # 1022646038
      GMC Sierra 4.8L / 5.3L / 6.0L 2012, XX Carbon™ Exhaust Collector Gasket by Percy's High Performance®. Collector Outlet Diameter: 2.625". Persy's High Performance makes exhaust manifold and collector gaskets that will withstand the...
      Modified engines have hotter exhaustBetter materials help seal poorly-mating flanges better.
      $13.65
    • (0 reviews)
      # 346356203
      GMC Sierra 2012, XX Carbon™ Exhaust Header Gaskets by Percy's High Performance®. These extreme high-temperature gaskets are well-suited for highly-modified engines: turbocharged, supercharged, nitrous or fuel. This is a premium,...
      Malleable stainless steel metal coreWill survive 2000°F exhaust temperatures for extended periods
      $22.41
    • (0 reviews)
      # 262494849
      GMC Sierra 2012, Exhaust Header Gaskets by Remflex®. Remflex's unique flexible graphite material has been proven for more than 30 years in industrial applications, where temperatures routinely exceed 2,000 degrees. Whether you have an...
      Designed to crush 50%.This allows them to fill gaps in the flange surface up to 1/16"3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $10.42 - $24.86
    • (0 reviews)
      # 231099608
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Exhaust Manifold Hardware Kit by Dorman®. Dorman manifold bolt and spring kits are just what you need to secure the front flange. Dorman offers products like fasteners and solutions to keep...
      Direct replacement for a proper fitBuilt to Last
      $5.27 - $5.53
    • (0 reviews)
      # mpn4562182850
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Exhaust Manifold Hardware Kit by Fel-Pro®. Set services one exhaust manifold or two exhaust manifolds. If you are looking for quality sealing solutions, Fel-Pro offers you various replacement...
      Direct OEM replacement for a proper fitEnsures reliable sealing performance
      $17.19
    • (0 reviews)
      # 231283252
      GMC Sierra 2012, Header Bolt Set by Mr. Gasket®. Whatever exhaust system you install on your engine, whether it’s a set of chromed headers or simply a set of cleaned up flat black rams horn manifolds, you’ll need gaskets and...
      Gaskets for every application, from mild to wildAluminum, copper or steel gaskets
      $8.59 - $38.70
    • (0 reviews)
      # 652224842
      GMC Sierra 2012, Vibe-Lock Header Bolt Kit by Percy's High Performance®. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost care and attention to detail, this...
      Built to match your exact requirementsHigh quality you can rely on
      $14.18 - $98.91
    • (0 reviews)
      # 378379871
      GMC Sierra 2012, Exhaust Manifold Hardware Kit by Stage 8®. Stage 8 manufacturers the World's Best Active Mechanical Locking systems. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are...
      Thoughtfully designed for the highest efficiency and safetyWill provide more breakaway torque than any other locking system
      $50.99 - $62.31
    • (0 reviews)
      # 314958261
      GMC Sierra 4.8L / 5.3L / 6.0L / 6.2L 2012, Header Locking Bolt Kit by Stage 8®. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are removable and reusable and can be visually inspected; if the...
      Thoughtfully designed for the highest efficiency and safetyWill provide more breakaway torque than any other locking system
      $62.31
    • (0 reviews)
      # 1364414924
      GMC Sierra 2012, Exhaust Manifold Gasket Set by Enginetech®. The Engine Builder's Source, can locate the right part for nearly any rebuild application. Offering a full line of internal engine parts for domestic, import and high...
      Rigorously tested to withstand years of abuseDesigned with innovative manufacturing techniques
      $9.35
    • (0 reviews)
      # mpn4525160244
      GMC Sierra 5.3L 2012, BlackHeart™ Stainless Steel Short Tube Exhaust Headers by Hooker®. Primary Tubing Diameter: 1.75". Color: Natural. Header Coating: Uncoated. Header Style: Short Tube. Hooker continues to push the boundaries of...
      Merged collectors for maximum flow and increased exhaust velocity0.375” thick precision water jet cut flanges for less warping, maximum sealing surface, and better seal
      $429.95
    • (0 reviews)
      # mpn4525157112
      GMC Sierra 4.3L 2012, Exhaust Header Flanges by Advance Adapters®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
      High quality at an affordable priceExpertly made from premium materials
      $35.70
    • (0 reviews)
      # 1362091141
      304 SS Short Tube Exhaust Headers by Flowtech®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Coating: Uncoated. Header Style: Short Tube. Flowtech’s emissions-friendly headers are just the ticket for those...
      Mandrel-bent tubing for smooth exhaust flowSturdy 16 gauge tubing
      $199.95 - $219.95
    • (0 reviews)
      # 1092289839
      304 SS Turbo Exhaust Headers by Stainless Works®. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to corrosion. Engineered with careful attention to the smallest detail...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $1,035.00 - $1,466.33
    • (0 reviews)
      # 1022499053
      Super Competition™ Flange Kit by Hooker®. Hooker offers a complete line of "hard to find" specialty header flanges. Flange kits come with gaskets, bolts and polished stainless steel NHRA contingency header I.D. tags.
      Kit Includes Stainless Steel NHRA Contingency ID Header Tag,Gaskets & BoltsExpertly crafted from premium materials
      $76.01 - $208.95
    • (0 reviews)
      # 781513773
      Exhaust Flanges by Kooks®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Kooks will last a lifetime. It will meet...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $13.17 - $85.49
    • (0 reviews)
      # mpn1622044890
      Universal Brass Exhaust Manifold Hardware Kit by Dorman®. Material: Brass. Dorman's Exhaust Nuts are now available separately for exhaust manifold repairs. These direct replacement nuts are ideal for securing exhaust components and used...
      Direct replacement for a proper fit every timeHigh-quality steel and rubber materials provides years of trouble-free service
      $3.68
    • (0 reviews)
      # mpn4564005319
      GMC Sierra 1500 4.8L / 5.3L / 6.0L / 6.2L 2012, Classic Polish Style Stainless Steel Long Tube Exhaust Headers by Jet-Hot®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 3". Color: Chrome. Header Coating: Ceramic Coating....
      Withstands 1250°FLowers surrounding temperatures by up to 65%
      $748.80
    • (0 reviews)
      # mpn4564002698
      GMC Sierra 2500 HD / 3500 HD 8 Engine VIN Character 2012, Twisted Steel™ Stainless Steel Exhaust Headers with Up-Pipes and Downpipe by aFe®. Two exhaust gas temperature (EGT) ports are provided with this system. A 0.125" NPT EGT probe...
      Optimized Tube Lengths Improve Flow and Performance100% Hand MIG-Welded Construction Ensures Optimal Strength and Durability
      $1,855.34
    • (0 reviews)
      # 1200566695
      GMC Sierra 2012, Long Tube Exhaust Headers with Y-Pipe by Torxe™. Collector Outlet Diameter: 3". Color: Silver. Header Style: Long Tube. This product is made of high-quality materials to serve you for years to come. Designed using...
      High quality at an affordable priceExpertly made from premium materials
      $460.00
    • (0 reviews)
      # 623309687
      GMC Sierra 2012, Exhaust Manifold Flange Gasket by Victor Reinz®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
      High quality at an affordable priceExpertly made from premium materials
      $6.15 - $6.66




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