2012 GMC Sierra Denali Performance Headers

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    • (1 review)
      # 231099766
      GMC Sierra Denali Flex 2012, Perfromance Headers 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...
      Increases low and mid-range horsepower and torqueIncreases engine efficiency
      $428.84 - $591.20
    • (0 reviews)
      # 231163762
      GMC Sierra Denali Crew Cab 6.6L 2012, Ductile Iron Manifold by aFe®. Material: Ductile Iron. Replace the exhaust manifold on your Dodge diesel with the BladeRunner stainless steel manifold. It was created to address a cracking...
      Cast from 304 stainless steelThick wall construction and reinforced ribs for maximum durability
      $495.00
    • (0 reviews)
      # 105140837
      GMC Sierra Denali 2012, Twisted Steel™ 409 SS 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...
      Optimized Tube Lengths Improve Flow and Performance100% hand MIG-welded construction ensures optimal strength and durability
      $795.00 - $1,595.00
    • (0 reviews)
      # 142866782
      GMC Sierra Denali 2012, Long Tube Headers by Flowtech®. Collector Outlet Diameter: 3". Carb Compliant: No. Material: Mild Steel. FLOWTECH headers are precision engineered and leak tested to get maximum performance and fuel economy...
      Mandrel-formed Power Plenum collectors for low backpressureConstructed of .060 cold roll flash mild steel tubing
      $302.95 - $555.95
    • (0 reviews)
      # 231283276
      GMC Sierra Denali 2012, Shorty Headers by Flowtech®. 1.625" Diameter, 2.5" Collector Diameter. Include all mounting hardware Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Carb Compliant: No. This product is made...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $312.95 - $416.95
    • (0 reviews)
      # 231032074
      GMC Sierra Denali 1500 2012, SuperMAXX Stainless Steel Natural Long Tube Exhaust Header by Dynatech®. Includes: Hardware, Gasket(s). Finish: Natural. Collector Length: 4.25". Material: Stainless Steel. Series: SuperMAXX. Thickness:...
      Perfect, direct bolt-on fit+15 HP and 38.5 Ft. Lbs of Torque
      $926.99
    • (0 reviews)
      # 221600012
      GMC Sierra Denali 6.0L / 6.2L 2012, Cat4ward Full-Length Header by JBA®. Primary Tube Diameter: 1-5/8". Collector Diameter: 3". JBA long tube headers are the number one choice for maximum performance gains and high RPM efficiency....
      3/8' thick CNC laser-cut flangesPatented JBA Firecone® merged collector
      $479.33 - $607.59
    • (0 reviews)
      # 221600020
      GMC Sierra Denali 1500 W/O EGR System 2012, Cat4ward Shorty Header by JBA®. Primary Tube Diameter: 1-5/8". Collector Diameter: 2.5". JBA shorty headers are one of the best performance upgrades available for any application. Hot Rod...
      Mandrel-bent stainless steel primary tubesPatented JBA Firecone® collector
      $440.92 - $595.75
    • (0 reviews)
      # 232519930
      GMC Sierra Denali 6.6L 2012, Race Stainless Steel Exhaust Manifold by PPE®. PPE’s Manifold and Up-Pipes are designed to maximize power and flow characteristics. The Up-Pipe bellows are high flow, internally sleeved and aircraft...
      Cast Hi-Sil Moly iron high-flow manifold constructionSignificant reduction in exhaust back pressures
      $986.39
    • (0 reviews)
      # 58838054
      GMC Sierra Denali 6.6L 2012, Stainless Steel Exhaust Manifold with Up-Pipes by PPE®. PPE’s High-Flow Exhaust Manifolds and Up-Pipes have a 53% greater flow over stock and are 50 State emissions legal. PPE Manifolds are made from...
      Cast Hi-Sil Moly iron high-flow manifold constructionSignificant reduction in exhaust back pressure
      $1,349.99
    • (0 reviews)
      # 231099694
      GMC Sierra Denali 6.0L 2012, Exhaust Headers by PaceSetter®. Primary Tubing Diameter: 1.875". Carb Compliant: No. Material: Mild Steel. From the leader in the design, manufacture and distribution of affordably priced, quality made...
      3/8” thick CNC-machined, port matched steel flanges1-7/8” or 1-3/4” 16-gauge mild steel, mandrel-bent primaries
      $296.99 - $443.87
    • (0 reviews)
      # 231099750
      GMC Sierra Denali 6.0L 2012, HTR Collector Gasket by Taylor Cable®. Series: HTR. This products is an OEM and Performance company that was built on its founding heritage supported by a tradition of Legendary Quality. Designed...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $17.10
    • (0 reviews)
      # 245514359
      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
      $11.68
    • (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...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $23.83 - $31.98
    • (0 reviews)
      # 262499983
      GMC Sierra Denali 6.0L 2012, Manifold/Header Gasket by Remflex®. Set of 2. 1-7/8" D Round Port. Remflex's unique flexible graphite material has been proven for more than 30 years in industrial applications, where temperatures...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $27.99
    • (0 reviews)
      # 74449575
      GMC Sierra Denali 6.6L 2012, Exhaust Manifold Gasket by Merchant Automotive®.
      High quality at an affordable priceExpertly made from premium materials
      $38.00
    • (0 reviews)
      # 231283300
      GMC Sierra Denali 2012, Header Bolt Set by Mr. Gasket®. 12 Pieces. 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...
      $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
      $49.65 - $57.15
    • (0 reviews)
      # 231099707
      GMC Sierra Denali 2012, Exhaust Manifold by Dorman®. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal reasons, but before you waste...
      $66.95 - $124.79
    • (0 reviews)
      # 231283297
      GMC Sierra Denali 6.0L / 6.2L 2012, Exhaust Manifold by ATP®. ATP Graywerks Exhaust Manifolds are a high quality OE replacement alternative. Each manifold is developed off of the original parts specifications, to ensure it will...
      Manufactured to OE design ensuring manifold will line up and flow like the original unitHigh grade metallurgy resists fatigue cracking and breakage
      $70.88 - $101.99
    • (0 reviews)
      # 231099738
      GMC Sierra Denali 6.6L 2012, 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...
      Eliminates the need to remove cylinder head, saving you time and moneyReduces installation time
      $28.10 - $47.82
    • (0 reviews)
      # 231161479
      GMC Sierra Denali Flex 2012, GM Original Equipment™ Manifold Gasket by ACDelco®. 12 Months, 12,000 Miles (Parts Only) Series: GM Original Equipment™. Designed utilizing the latest technology, this product by ACDelco features...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $13.51
    • (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
      $34.00
    • (0 reviews)
      # mpn584304642
      Universal Afterburner™ Thrust Toobs Headers Extension by Flowtech®. 3" Inlet, 12" Long, 3-Bolt, Package contains one pair Series: Afterburner™. Afterburner Thrust Toobs used with open headers are designed to complete the system...
      Expertly crafted from premium materials3-Bolt, 3” ID, 12” Long
      $38.44
    • (0 reviews)
      # 266461787
      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)
      # 255773604
      Universal Collector Gaskets by JBA®. JBA is proud to offer accessories to aid in the fitment of your JBA exhaust product. This product is made of high-quality materials to serve you for years to come. Designed using...
      JBA's premium header flange gaskets are made extra thick from a specially made formulated gasket materialTheir gaskets are rated up to 1100 F
      $11.97 - $13.70
    • (0 reviews)
      # 266461866
      Universal 2 into 1 Y-Pipe Collector by Schoenfeld Headers®. 1 Piece. 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
      $101.03 - $112.26
    • (0 reviews)
      # 266461864
      Universal 3 Bolt 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 meticulous...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $5.86 - $6.24
    • (0 reviews)
      # 266461865
      Universal Collector Insert Reducer 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
      $20.77
    • (0 reviews)
      # 266461872
      Universal Slip Over 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 attention...
      Engineered to enhance your vehicle's performanceMade to stringent quality standards
      $44.67 - $221.08
    • (0 reviews)
      # 266461831
      Universal Ball-Socket 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, Ball &...
      Available in 304 Stainless Steel, Aluminized Steel, Mild SteelEasy to Install
      $26.79 - $152.89
    • (0 reviews)
      # 266461804
      Universal 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
      $19.43 - $51.27
    • (0 reviews)
      # 266461856
      Universal Husler Race Hedder 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
      $25.02 - $28.68
    • (0 reviews)
      # 266461860
      Universal Mild Steel Header Collectors by Hedman Hedders®. 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 materials to provide the highest level...
      Designed to boost your vehicle's performanceMade from high-quality materials
      $45.51 - $205.38
    • (0 reviews)
      # 171670489
      Universal Ball and Socket Connector 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...
      Made of high Quality MaterialsDesigned to match rigorous quality standards
      $58.16 - $257.36
    • (0 reviews)
      # 171670471
      Universal Collector by Kooks®. With 9-10" long body. Plus 2" for slip on stub section. 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...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $118.93 - $434.57
    • (0 reviews)
      # 171670709
      Universal Collector Weld-On Reducer Cone 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...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $16.40 - $53.30
    • (0 reviews)
      # 142860869
      Universal Terminator™ Reducer Street Hookup by Flowtech®. 3-Bolt. Terminator fully-welded reducers/street hookups are designed to be used behind three-bolt design collectors and help make any header installation complete.
      Fully-welded constructionDurable 16 gauge construction
      $39.48
    • (0 reviews)
      # 171670484
      Universal Collector Gasket 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....
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $13.69
    • (0 reviews)
      # 171670688
      Universal Exhaust Gasket 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....
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $13.69 - $28.12
    • (0 reviews)
      # 171670635
      Universal Steel Exhaust Flange 3" 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...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $13.17 - $98.42
    • (0 reviews)
      # 266461774
      Universal Real-Seal™ Collector Gasket Kit by Flowtech®. Series: Real-Seal™. Flowtech Real-Seal collector gaskets are a revolutionary break-through exhaust sealing technology. Constructed of separate layers of "Dead Soft"...
      Multi-Layer "Dead Soft" aluminum conforms to create a leak proof sealWater - Weather Resistant
      $21.79 - $23.88
    • (0 reviews)
      # 266461803
      Universal Heat Screen by Design Engineering®. 1 Piece.
      $75.07 - $99.74
    • (0 reviews)
      # mpn359115759
      XX Carbon Header Gasket Material, 6" x 24" by Percy's High Performance®. These gaskets are designed to give the performance you expect at a price you can afford. Our XX Carbon gaskets are made of Taylor's proprietary 100% carbon...
      Limited Lifetime Replacement WarrantyWithstands Long Term Exposure To Over 2000 Degrees
      $26.43
    • (0 reviews)
      # mpn358503389
      Universal Collector/Reducer Flange Gasket by Remflex®. Set of 2. Port Size across the center of the gasket - Width 3-1/8", Height 2-7/8". Bolt Center to Bolt Center - Width 3-7/8", Height 3-11/16". 4-Bolt Holes. Remflex's unique...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $15.99
    • (0 reviews)
      # mpn3242574497
      Universal Display Gasket Kit 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 day, week after...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $472.75
    • (0 reviews)
      # 262500427
      Universal Exhaust Collector 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 day, week...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $8.14 - $14.67
    • (0 reviews)
      # 262500454
      Universal Exhaust Flange 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 day, week...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $7.19 - $12.79
    • (0 reviews)
      # 262500472
      Universal Exhaust Header Gasket by Remflex®. Set of 2. 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...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $16.15 - $39.97
    • (0 reviews)
      # 262500488
      Universal Gasket Sheet by Remflex®. 1 Peace. 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 day, week...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $23.83 - $44.25
    • (0 reviews)
      # mpn3242574414
      Universal Y-Pipe Flange Gasket by Remflex®. 1 Peace. (2) 1-1/2" D Round Ports, with 3 Bolt Holes, Bolt Hole Spacings (A) 4-5/8" x (B) 3-5/16". Remflex's unique flexible graphite material has been proven for more than 30 years in...
      Remflex exhaust gaskets come in a standard 1/8" thickness and are designed to crush 50%. This allows them to fill gaps in the flange surface up to 1/16"100% flexible graphite construction means Remflex gaskets are good for up to 3,000 degrees F - far exceeding that of any vehicle's exhaust system temperature
      $10.28
    • (0 reviews)
      # 213768930
      Universal Aluminized Heat Barrier by Thermo-Tec®. 1 Piece. The Aluminized Heat Barrier is made up of woven silica with a flexible aluminized finish. The highly-reflective surface of the material is capable of withstanding radiant...
      Designed to provide the ultimate in heat protectionTested to deliver exceptional quality
      $95.03 - $1,264.89
    • (0 reviews)
      # 213768933
      Universal Anodized Heat Barrier by Thermo-Tec®. 1 Piece. Anodized Gold Heat Barrier is a high tech heat barrier with a bright anodized gold finish. Anodizing is a process where the aluminum foil finish is made stronger and more...
      Bright, attractive anodized gold finishAggressive adhesive that adheres to any surface
      $53.41 - $186.11
    • (0 reviews)
      # 213768937
      Universal Black Graphite Exhaust Insulating Header Wrap by Thermo-Tec®. Wrapping headers and exhaust maintains hotter exhaust gases that exit the system faster through decreased density. Increased exhaust scavenging is produced,...
      Withstands continuous heat up to 2000 degreesLow profile. Only 1/16" thick
      $13.69 - $102.76
    • (0 reviews)
      # 213768947
      Universal Carbon Fiber Exhaust Insulating Wrap by Thermo-Tec®. 1 Piece. Wrapping headers and exhaust maintains hotter exhaust gases that exit the system faster through decreased density. Increased exhaust scavenging is produced,...
      Withstands Heat Up To 2000 degreesMade From Lava Rock
      $44.30 - $66.28
    • (0 reviews)
      # 213768976
      Universal Exhaust Insulating Header Wrap by Thermo-Tec®. Exhaust Wrap is an innovative way to create more horsepower and reduce under-hood temperatures. The original Exhaust Insulating Wrap was developed over 25 years ago by...
      Designed to provide the ultimate in heat protectionTested to deliver exceptional quality
      $12.73 - $262.89
    • (0 reviews)
      # 213768983
      Universal Exhaust Insulating Wrap Kit by Thermo-Tec®. Comes in a kit. Includes Exhaust Insulating Wrap, Hi-Heat Coating and Snap Strap. Available in Black and Original. Now you can get everything you need for a complete,...
      Designed to provide the ultimate in heat protectionTested to deliver exceptional quality
      $75.57 - $142.36
    • (0 reviews)
      # 213768995
      Universal Generation 2 Copper Header Wrap by Thermo-Tec®. 1 Piece. Generation 2 Copper Exhaust Wrap is sold in one or two inch wide, 50 foot rolls with a low profile 1/16" thickness. Generation 2 Copper Header Wrap improves heat...
      Designed to provide the ultimate in heat protectionTested to deliver exceptional quality
      $39.94 - $62.89
    • (0 reviews)
      # 213768998
      Universal Header Manifold Blanket by Thermo-Tec®. This flexible heat shield simply clips into place on the upper portion of the header. The fabric side of the material should be facing the heat source and can withstand direct heat...
      Deflects up to 750 degrees Fahrenheit in direct contactDeflects up to 2000 degrees Fahrenheit radiant heat
      $93.63 - $99.60
    • (0 reviews)
      # 213769020
      Universal High Velocity Exhaust Jackets by Thermo-Tec®. Comes in a kit. Includes pinch clips. The new quick-wrap high-velocity Exhaust Jackets are an innovative way to insulate and block radiant heat. The jackets cover the tubes...
      Insulates And Blocks Radiant HeatExpertly crafted from premium materials
      $80.45 - $102.90




    2012 GMC Sierra Denali Performance Headers Reviews

    Average rating:  4.5  4.5 - 39 reviews
    5 of 5
    CanAmMex® 00747-212 - Thunderbolt™ Hi-Polished Single Rolled Angled Oval Tip
    These appear to be of very good quality, good welds.
    JPosted by John (Enfield, CT) / February 24, 2016
    Was this review helpful for you? Yes
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