2012 GMC Sierra Denali Performance Headers

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    • (2 reviews)
      # 231099665
      GMC Sierra Denali without Air Injection without EGR System 6.0L / 6.2L 2012, Performance Short Tube Exhaust Headers by Gibson®. Collector Outlet Diameter: 2.5". Emissions: CARB compliant. Header Style: Short Tube. Includes: Premium...
      Increases low and mid-range horsepower and torqueIncreases engine efficiency
      $454.08 - $596.99
    • (0 reviews)
      # 105140837
      GMC Sierra Denali 2012, Twisted Steel™ 409 SS Mid-Length 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...
      Optimized Tube Lengths Improve Flow and Performance100% hand MIG-welded construction ensures optimal strength and durability
      $829.00 - $1,629.00
    • (0 reviews)
      # 448269159
      GMC Sierra Denali 6.2L 2012, 304 SS Header Off Road Assembly by Stainless Works®. Emissions: EPA compliant. Primary Tubing Diameter: 1.875". Collector Outlet Diameter: 3". Color: Silver. Header Coating: Uncoated. Header Style: Long...
      304 Stainless Steel ConstructionTIG-Welded
      $1,539.00 - $1,729.00
    • (0 reviews)
      # mpn3069277255
      GMC Sierra Denali 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 with the stock...
      Thick wall construction and reinforced ribs for maximum durabilityOutflows the factory exhaust manifolds, improving performance and throttle response
      $510.00
    • (0 reviews)
      # 496386077
      GMC Sierra Denali 6.0L / 6.2L 2012, Block Hugger Exhaust Headers by Flowtech®. Emissions: EPA compliant. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. Flowtech Headers are the perfect...
      Tight fit block hugger design for popular hot rod and street rodsHeavy duty 16-gauge tubing for increased strength and durability
      $207.95 - $310.95
    • (0 reviews)
      # 496315075
      GMC Sierra Denali 6.0L / 6.2L 2012, Lakester™ Exhaust Headers by Flowtech®. Emissions: EPA compliant. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3". Premium aluminum header gaskets and installation hardware...
      High flow, mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocityHeavy duty tubing and high quality welds for increased strength and durability
      $416.95 - $520.95
    • (0 reviews)
      # 448381179
      GMC Sierra Denali 2012, Long Tube Exhaust Headers by Flowtech®. Emissions: EPA compliant. Collector Outlet Diameter: 3". Header Style: Long Tube. FLOWTECH headers are precision engineered and leak tested to get maximum performance...
      Mandrel-formed Power Plenum collectors for low backpressureLong transition collectors with merge spears for maximum flow and increased exhaust velocity
      $302.95 - $555.95
    • (0 reviews)
      # 496328084
      GMC Sierra Denali 6.0L / 6.2L 2012, Ram Horn Exhaust Manifold by Flowtech®. Emissions: EPA compliant. Collector Outlet Diameter: 2.25". Flowtech exhaust manifolds are the perfect combination of quality and value. This Rams horn...
      Maximum engine clearance and maximum strengthSmooth transition, 1-5/8” diameter primaries are used for increased exhaust flow increasing performance and improving throttle response
      $207.95 - $310.95
    • (0 reviews)
      # 448317159
      GMC Sierra Denali 2012, Shorty Exhaust Headers with Gaskets by Flowtech®. Emissions: EPA compliant. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Header Style: Short Tube. Include all mounting hardware....
      Mandrel-bent tubing for smooth exhaust flowSturdy 16 gauge tubing
      $312.95 - $416.95
    • (0 reviews)
      # 496426083
      GMC Sierra Denali 6.0L / 6.2L 2012, Stainless Steel Upright Exhaust Headers by Flowtech®. Emissions: EPA compliant. Collector Outlet Diameter: 3". Color: Silver. Header Coating: Uncoated. Flowtech Headers are the perfect...
      Consistent tubing diameters for smooth flowIncreases the cylinder scavenging effect and improves engine breathing
      $219.95 - $239.95
    • (0 reviews)
      # mpn358945626
      GMC Sierra Denali 6.2L 2012, SuperMAXX Stainless Steel Natural Long Tube Exhaust Headers by Dynatech®. Collector Length: 4.25". Finish: Natural. Header Style: Long Tube. Includes: Hardware, Gasket(s). SuperMAXX Stainless Long Tube...
      Perfect, direct bolt-on fit+15 HP and 38.5 Ft. Lbs of Torque
      $899.99
    • (0 reviews)
      # mpn358954139
      GMC Sierra Denali 6.0L / 6.2L 2012, SlickFit Steel Natural Short Tube Exhaust Header by Advance Adapters®. Finish: Natural.
      $306.32
    • (0 reviews)
      # 221600012
      GMC Sierra Denali 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. Includes: Hardware, Gaskets. JBA long tube...
      3/8' thick CNC laser-cut flangesPatented JBA Firecone® merged collector
      $490.69 - $613.17
    • (0 reviews)
      # 221600020
      GMC Sierra Denali 6.2L 2012, Cat4ward Stainless Steel Shorty Exhaust Headers by JBA®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Emissions: CARB compliant. Header Style: Short Tube. Includes: Hardware,...
      Mandrel-bent stainless steel primary tubesPatented JBA Firecone® collector
      $460.98 - $601.57
    • (0 reviews)
      # 409386833
      GMC Sierra Denali 6.0L 2012, Mild Steel Long Tube Exhaust Headers by PaceSetter®. Primary Tubing Diameter: 1.875". Collector Outlet Diameter: 3". Emissions: EPA compliant. Header Style: Long Tube. From the leader in the design,...
      3/8” thick CNC-machined, port matched steel flanges1-7/8” or 1-3/4” 16-gauge mild steel, mandrel-bent primaries
      $336.58 - $503.04
    • (0 reviews)
      # 466681127
      GMC Sierra Denali 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...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $43.70
    • (0 reviews)
      # mpn358582413
      GMC Sierra Denali 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 part...
      High quality at an affordable priceExpertly made from premium materials
      $115.02
    • (0 reviews)
      # 231099750
      GMC Sierra Denali 6.0L 2012, HTR Collector Gaskets by Taylor Cable®. This products is an OEM and Performance company that was built on its founding heritage supported by a tradition of Legendary Quality. Designed utilizing the...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $13.87
    • (0 reviews)
      # mpn358587986
      GMC Sierra Denali 6.0L 2012, Header Gasket by Howe Racing Enterprises®. 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...
      Built to match your exact requirementsHigh quality you can rely on
      $11.92
    • (0 reviews)
      # 262494919
      GMC Sierra Denali 2012, Exhaust Header Gasket 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 - day after...
      $24.31 - $32.62
    • (0 reviews)
      # mpn469957889
      GMC Sierra Denali 6.6L 2012, Exhaust Manifold Gasket by Merchant Automotive®.
      High quality at an affordable priceExpertly made from premium materials
      $46.85
    • (0 reviews)
      # 231283300
      GMC Sierra Denali 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...
      Gaskets for every application, from mild to wildAluminum, copper or steel gaskets
      $8.15 - $36.69
    • (0 reviews)
      # 231099704
      GMC Sierra Denali 2500 HD with Dana 60 Axles 2012, Vibe-Lock Header Bolt Kit by Taylor Cable®. 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
      $50.64 - $58.29
    • (0 reviews)
      # 346356425
      GMC Sierra Denali 2500 HD 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...
      Built to match your exact requirementsHigh quality you can rely on
      $79.73 - $94.27
    • (0 reviews)
      # 231099707
      GMC Sierra Denali 2012, Cast Iron Natural Exhaust Manifold by Dorman®. Finish: Natural. Since this part is a direct replacement, the exact fit adds another layer of efficiency and convenience.
      High Quality tubular construction protects against warping and/or crackingLeak-resistant for long-lasting performance
      $60.95 - $128.95
    • (0 reviews)
      # mpn888405507
      GMC Sierra Denali Flex 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...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $9.48
    • (0 reviews)
      # mpn1520366
      GMC Sierra Denali 6.0L / 6.2L 2012, Exhaust Manifold Gasket Set by Fel-Pro®. Includes: 2 Gaskets. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and...
      Direct OEM replacement for a proper fitEnsures reliable sealing performance
      $9.12
    • (0 reviews)
      # 276235988
      GMC Sierra Denali 6.0L / 6.2L 2012, Steel Exhaust Manifold Hardware Kit by Dorman®. Material: Steel. Dorman manifold bolt and spring kits are just what you need to secure the front flange. Dorman offers products like fasteners and...
      Direct replacement for a proper fitBuilt to Last
      $8.75 - $8.87
    • (0 reviews)
      # 314959087
      GMC Sierra Denali 6.0L / 6.2L 2012, Header Locking Bolt Kit by Stage 8®. Thread Pitch: 3/8"-16. Length: 3/4". Package: For 16 Points. Stage 8 manufacturers the World's Best Active Mechanical Locking systems. Stage 8 locking...
      Thoughtfully designed for the highest efficiency and safetyWill provide more breakaway torque than any other locking system
      $62.31
    • (0 reviews)
      # 466253465
      GMC Sierra Denali 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 will...
      High quality at an affordable priceExpertly made from premium materials
      $269.14 - $386.13
    • (0 reviews)
      # 447995584
      GMC Sierra Denali 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
      $405.75 - $594.82
    • (0 reviews)
      # 378622296
      GMC Sierra Denali 6.0L / 6.6L 2012, Fenderwell Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". This superior Patriot EXhaust product is just for you. Carefully designed for...
      Expertly crafted from premium materialsQuality design and workmanship
      $311.23 - $606.17
    • (0 reviews)
      # 378622284
      GMC Sierra Denali 6.0L / 6.6L 2012, Full-Length Exhaust Headers by Patriot Exhaust®. Collector Outlet Diameter: 3". This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more...
      Expertly crafted from premium materialsQuality design and workmanship
      $297.37 - $687.03
    • (0 reviews)
      # 378622313
      GMC Sierra Denali 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
      $268.98 - $563.02
    • (0 reviews)
      # 378622309
      GMC Sierra Denali 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 designed...
      Expertly crafted from premium materialsQuality design and workmanship
      $267.16 - $507.72
    • (0 reviews)
      # 285466057
      Universal Aluminized Steel Header Collector Ball Flange Kit by Flowmaster®. Material: Aluminized Steel. Includes: Bolts and Studs. The Collector Ball Flange takes the place of the messy three-bolt connections and ensures a...
      Replaces Messy 3-Bolt Flange ConnectionEnsures Leak Free Connection
      $101.48 - $101.98
    • (1 review)
      # 285466056
      Universal Scavenger Series Y-Collector by Flowmaster®. The patented Scavenger Y-Collector is based on the principles of Pulse Technology. They are designed to harmonize the exhaust pulses from two cylinders that are at the opposite...
      Race Proven TechnologyPatented Design that Creates Low Pressure Zones for Better Scavenging
      $48.74 - $55.38
    • (0 reviews)
      # 285466062
      Universal Header Merge Collector by MagnaFlow®. These headers are a cost effective an easy way to boost your vehicle's horsepower and torque in almost nothing flat. They are made of mandrel bent stainless steel with a ceramic...
      Easy and a cost effective solution to add horsepower and torque to your enginePrecisely designed for quality, fit and function
      $248.00 - $311.58
    • (0 reviews)
      # mpn1295593899
      Universal 304 SS 2-Bolt Manifold Flange by Stainless Works®. Primary Tubing Diameter: 3.02". Material: 304 SS. This superior product is made from high-grade stainless steel to ensure excellent quality and maximum resistance to...
      Designed to meet strict quality standardsCarefully crafted from first-rate stainless steel
      $38.00
    • (0 reviews)
      # 466746659
      Universal Ball-Socket Style Exhaust Flange Kit by Hedman Hedders®. Ball & Socket Header Flange Kits allow you to convert a gasket style, or race style header collector to a gasket-free Ball-Style Collector. Hedman’s gasketless,...
      Available in 304 Stainless Steel, Aluminized Steel, Mild SteelEasy to Install
      $28.13 - $138.07
    • (0 reviews)
      # 466972652
      Universal Exhaust Header Reducers by Hedman Hedders®. Hedman reducers (exhaust system adapters) weld on to your exhaust system, so you can easily bolt up your Hedman Hedders to the vehicle’s exhaust.
      Available in Mild Steel, Aluminized Steel or Stainless SteelAll necessary hardware included
      $20.08 - $49.48
    • (0 reviews)
      # 466877651
      Universal Header Reducers by Hedman Hedders®. Many of Hedman's newer hedder models utilize a ball & socket style collector. If your Hedman Hedders have thisstyle of collector they do not require a gasket.
      Made of High Quality MaterialsBuilt to Last
      $25.52 - $30.39
    • (0 reviews)
      # 466734101
      Universal Heat Riser Valve by Hedman Hedders®. Universal heat riser valve adapters are available in two and three bolt designs, and fit 2-1/2" and 3" collectors.
      Made of High Quality MaterialsEnsure Optimum Performance
      $52.72 - $70.10
    • (0 reviews)
      # 466901649
      Universal Mild Steel Exhaust Headers Collectors by Hedman Hedders®. Material: Mild Steel. This Hedman Hedders product is just the option for you in case you want to get the most out of your auto. It is made from first-rate...
      Designed to boost your vehicle's performanceMade from high-quality materials
      $45.39 - $209.49
    • (0 reviews)
      # 285466074
      Universal 304 SS Merge Collector by Vibrant Performance®. Material: 304 SS. Vibrant Performance offers a comprehensive, high quality and affordably priced range of T304 Stainless Steel Merge Collectors to help free up maximum...
      Help free up maximum horsepowerEasy To Use
      $52.95 - $267.54
    • (0 reviews)
      # 482094993
      Universal 304 SS Slip Joint Adapter by Vibrant Performance®. Material: 304 SS. Vibrant Performance offers a comprehensive, high quality and affordably priced range of T304 Stainless Steel Merge Collectors to help free up maximum...
      Help free up maximum horsepowerEasy To Use
      $31.45 - $59.95
    • (0 reviews)
      # mpn1300425166
      Universal Low Carbon Steel Exhaust Header Extensions by DynoMax®. Material: Low Carbon Steel. With their great selection of exhaust pipes and accessories, DynoMax will provide you with everything necessary to complete the exhaust...
      Designed to ensure unrestricted exhaust flowDirect fit – no modifications needed to install
      $58.24
    • (0 reviews)
      # 466758648
      Universal Reducer by Flowtech®. Flowtech understands that when you purchase a set of headers, a muffler, or even an entire exhaust system, you want to know that you’re getting everything you need to complete the installation.
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $19.42 - $128.95
    • (0 reviews)
      # 285466054
      Universal Elbow Kit by Dynatech®. These Long Tube Pavement Late Model Headers are designed for use with Standard Chevy engines. The Long Tube design promotes excellent torque throughout the RPM range.
      35” Equal Length primaries for maximum Torque and HorsepowerValve covers are removable with headers installed
      $105.99 - $109.99
    • (0 reviews)
      # 285466053
      Universal High-Velocity Merge Collector by Dynatech®. Dynatech Merge Collectors are an excellent way to maximize the potential of your exhaust system. When your exhaust system requires the maximum horsepower, a set of Dynatech...
      Maximizes the potential of the exhaust systemMade of High Quality Materials
      $199.99
    • (0 reviews)
      # 466303475
      Universal Aluminized Steel 3-Bolt Flange Header Buddy Reducer by Jones Exhaust®. Material: Aluminized Steel. Thoroughly engineered to perform and outperform any competition, these premium exhaust pipes by Jones Exhaust are a must...
      High quality at an affordable priceExpertly made from premium materials
      $33.06 - $33.46
    • (0 reviews)
      # mpn478097096
      Universal Aluminized Steel 3-Bolt Flange Header Collector Extension by Jones Exhaust®. Material: Aluminized Steel. This Jones Exhaust product is just the option for you in case you want to get the most out of your auto. It is made...
      High quality at an affordable priceExpertly made from premium materials
      $18.97
    • (0 reviews)
      # 285466061
      Universal Aluminized Steel 3-Bolt Flange Header Collector Extension by Jones Exhaust®. Material: Aluminized Steel. This Jones Exhaust product is just the option for you in case you want to get the most out of your auto. It is made...
      High quality at an affordable priceExpertly made from premium materials
      $10.08 - $12.98
    • (0 reviews)
      # 285466065
      Universal 3 Bolt Style Exhaust Collector Flange Kit by Patriot Exhaust®. Flange kits include two flanges, gaskets and flange bolts. All round collector flanges include two block off plates and two flanges. 4-gauge flange thickness....
      Welding Required: YesCollector Ring Finish: Natural
      $12.97 - $17.38
    • (0 reviews)
      # 285466064
      Universal 4-1 Formed Collectors by Patriot Exhaust®. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product is built...
      Expertly crafted from premium materialsQuality design and workmanship
      $37.60 - $89.19
    • (0 reviews)
      # 285466066
      Universal Collector Reducer by Patriot Exhaust®. Patriot Exhaust collector reducers are zinc plated to minimize corrosion while providing a weldable finish. All collector reducer kits come with two reducers, gaskets and flange bolts.
      Zinc plated to minimize corrosionWeld on reducers
      $25.80 - $31.60
    • (0 reviews)
      # mpn358950043
      Universal Dome Style Reducer by Patriot Exhaust®. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product is built...
      Expertly crafted from premium materialsQuality design and workmanship
      $36.04
    • (0 reviews)
      # 378475798
      Universal Exhaust Turnout Kit by Patriot Exhaust®. This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will more than just meet your needs and expectations. This product is built...
      Expertly crafted from premium materialsQuality design and workmanship
      $87.02 - $151.76
    • (0 reviews)
      # 266461865
      Universal 2 into 1 Y-Pipe Collector by Schoenfeld Headers®. This top-notch product by Schoenfeld Headers is made to give that extra boost that every driver appreciates. This product is designed with utmost care and meticulous...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $99.83 - $110.91
    • (0 reviews)
      # 466906651
      Universal 3-Bolt Exhaust Header Collector Flange by Schoenfeld Headers®. This top-notch product by Schoenfeld Headers is made to give that extra boost that every driver appreciates. This product is designed with utmost care and...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $5.66 - $6.04





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