Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®

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Gaskets and Seals

Shop Muscle Car Headers & Exhaust At Speedway Motors

Speedway Motors has the muscle car headers and mufflers you need, at a price you can afford. Check out our huge inventory of chassis headers, LS1 swap headers and tight-fit block hugger headers, all available with durable ceramic AHC coating, polished, or stainless steel. Don't forget about our cast iron exhaust manifolds and dual exhaust kits as well. With an awesome selection of high performance Flowmaster mufflers, exhaust wrap, glasspacks, and exhaust tips, Speedway can help you get the roar you want from your muscle car without the roar from your wife for spending too much money!

Featured Products
  • Heater Sealing Foam, 25 FT Roll, 3/4 Inch Thick x 1-1/4 Inch Wide
    Heater Sealing Foam, 25 FT Roll, 3/4 Inch Thick x 1-1/4 Inch Wide
    (Part #9102300)
    x
                This sealing foam works great for heaters, ducting, or weather stripping in automotive applications to eliminate air leaks. It comes in 25 foot rolls at 3/4" thick x 1-1/4" wide.
    • 25' roll
    • Eliminates air leaks
    • Self adhesive back is designed for pressurized air sealing in automotive heaters, ducting, or weather stripping
  • Fel-Pro 1142-026 PermaTorque Multi-Layer Steel Head Gasket, Small Block Chevy
    New
    Fel-Pro 1142-026 PermaTorque Multi-Layer Steel Head Gasket, Small Block Chevy
    (Part #3441142026)
    x
                

    Fel-Pro Performance head gaskets are proven to handle big power and are designed to maintain contact pressure between the cylinder head and block during engine operation.  Manufactured to work great with both cast iron and aluminum heads, pre-flattened steel wire ring gaskets have the strength of steel wire sealing with minimum brinelling of aluminum heads. Pre-flattened copper wire ring gaskets will not brinell aluminum heads. They offer superior heat dissipation. Multi-layer steel gaskets offer current leading-edge technology and provide a long-term, leakproof seal called Perma Torque MLS. Engines with open deck surfaces, numerous cooling passages, and relatively few head fasteners will greatly benefit from Fel-Pro performance PermaTorque MLS head gaskets.

    • Works for 265-350 Small Block Chevy
    • Gaskets are sold each
    • Multi-layer
    • 4.100" gasket bore
    • Nominal compression thickness: .026"
    • Compressed volume: 5.7 cc
    • Not for use with small block 400.
    • When using aluminum heads, we recommend gaskets with soft copper wire rings (such as 344-1010). This ensures that the aluminum head is not "scarred" by the combustion seal. Shim style 344-1094 will also work well with aluminum heads.

    Head Gasket Application (JPEG)

    Speedy Tip for Proper Head Gasket Seal (GIF)  

  • Walker 346 Radiator Transmission Cooler Steel Line Straight Fittings
    Walker 346 Radiator Transmission Cooler Steel Line Straight Fittings
    (Part #820346)
    x
                1/8" NPT and screw into most standard radiator transmission coolers. Straight for 5/16" steel line. 
            
  • Speedway Small Block Chevy Overhaul Gasket Set, 350 Chevy, '67-'85
    Speedway Small Block Chevy Overhaul Gasket Set, 350 Chevy, '67-'85
    (Part #9152350)
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                Speedway standard rebuild gasket sets feature composite head gaskets, intake, water pump, valve cover, front cover and seal, oil pan and rear main seal.
            
  • Fel-Pro P1003 S/B Chevy 265-400 Steel Ring Head Gasket 4.166 Inch Bore
    Fel-Pro P1003 S/B Chevy 265-400 Steel Ring Head Gasket 4.166 Inch Bore
    (Part #3441003)
    x
                

    These Fel-Pro gaskets work with both cast iron and aluminum heads. Pre-flattened steel wire ring gaskets have the strength of steel wire sealing with minimum brinelling of aluminum heads. Pre-flattened copper wire ring gaskets will not brinell aluminum heads. They offer superior heat dissipation. Multi-layer steel gaskets offer current leading-edge technology and provide a long-term, leakproof seal called Perma Torque MLS.

    • Gaskets are sold each
    • Pre-flattened steel wire
    • Nominal compression thickness: .041"
    • Compressed volume: 9.1 cc
    • 4.166" bore gaskets can be used on 400 race engines with up to 4.155" max bore with minimal chamfer
    • When using aluminum heads, we recommend gaskets with soft copper wire rings (such as 344-1010). This ensures that the aluminum head is not "scarred" by the combustion seal. Shim style 344-1094 will also work well with aluminum heads.

    Head Gasket Application (JPEG)

    Speedy Tip for Proper Head Gasket Seal (GIF)  

  • Speedway 1955-76 Small Block Chevy Head Gasket Set
    Speedway 1955-76 Small Block Chevy Head Gasket Set
    (Part #5501130)
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    Speedway Small Block Chevy (SBC) composite head gaskets use premium materials to ensure a positive seal on any race or street engine. This gasket is sold in pairs.

    • Sold in Pairs
    • 4.0" bore steel shim (.016")
    • Small Block Chevy
    • 1957-1976 Only

    NOTE: Only fits 1957-1976 Chevy blocks and heads (they will leak at the bottom of later heads). Will NOT fit 1996-1999 GM "Vortec" 906 heads and 062 heads, or RHS Vortec heads.

  • Ford C-4 Automatic Transmission Oil Pan Gasket
    Ford C-4 Automatic Transmission Oil Pan Gasket
    (Part #91010229)
    x
                This oil pan gasket is made to work with your Ford C-4 automatic transmission. It is .07" thick and made of rubber impregnated cork. 
    • .07" thick rubber impregnated cork gasket
    • Sold individually
    • Ford C-4 transmission
  • Fel-Pro Gaskets 1206 S/B Chevy Intake Manifold Gaskets, 1.34x2.21 Inch
    Fel-Pro Gaskets 1206 S/B Chevy Intake Manifold Gaskets, 1.34x2.21 Inch
    (Part #3441206)
    x
                Fel-Pro Blue Stripe premium quality intake manifold gaskets for Small Block Chevy (SBC).
            

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  • Speedway Extreme Gaskets, 2-1/2 Inch Collector Gaskets
    Speedway Extreme Gaskets, 2-1/2 Inch Collector Gaskets
    (Part #91013540)
    x
                
    • Reusable triple-layer gasket
    • Stainless steel with a heat-resistant, rubber-based inner core
    • 0.085” thick, ultra pliable
    • Easily conforms to surface irregularities to create a tight, leak-proof seal
  • Schoenfeld Headers 0450 Small Block Mopar Header Gaskets
    Schoenfeld Headers 0450 Small Block Mopar Header Gaskets
    (Part #9170450)
    x
                Schoenfeld header gaskets for Small Block Mopar 273-318-340-360.
            
  • Fel-Pro Gaskets 1470 Exhaust Header Gasket for SBC ZZ4/Fastburn
    Fel-Pro Gaskets 1470 Exhaust Header Gasket for SBC ZZ4/Fastburn
    (Part #3441470)
    x
                

    This header exhaust gasket is used on most GM ZZ4 crate engines with Fastburn style heads (with raised 'D' shaped exhaust ports).

  • Dynatech 794-50001 B/B Chevy Fiber Exhaust Header Gaskets
    Dynatech 794-50001 B/B Chevy Fiber Exhaust Header Gaskets
    (Part #31179450001)
    x
                

    These Dynatech® header exhaust gaskets are manufactured at the highest quality for racing and high performance applications. They are CAD designed for the most precise fit possible.  Fits Big Block Chevy 396-454 V-8 engines. 

    Sold in pairs.

  • Fel-Pro Gaskets 1427 Ford N351 Exhaust Header Gaskets
    Fel-Pro Gaskets 1427 Ford N351 Exhaust Header Gaskets
    (Part #3441427)
    x
                Fel-Pro Blue Stripe exhaust header gaskets for Ford N351 cylinder heads.
            
  • Speedway Extreme Gaskets, 3 Inch Collector Gaskets
    Speedway Extreme Gaskets, 3 Inch Collector Gaskets
    (Part #91013541)
    x
                
    • Reusable triple-layer gasket
    • Stainless steel with a heat-resistant, rubber-based inner core
    • 0.085” thick, ultra pliable
    • Easily conforms to surface irregularities to create a tight, leak-proof seal
  • Speedway Extreme Gaskets, SB Chevy, 1-5/8 In Rectangular Port
    Speedway Extreme Gaskets, SB Chevy, 1-5/8 In Rectangular Port
    (Part #91013505)
    x
                
    • Reusable triple-layer exhaust gasket
    • Stainless steel with a heat-resistant, rubber-based inner core
    • 0.085” thick, ultra pliable
    • Available for many popular flange configurations
    • Easily conforms to surface irregularities to create a tight, leak-proof seal
    • Works well with a wide range of flange surfaces and block and head materials
  • Schoenfeld Headers 0150 S/B Chevy Round Port Exhaust Header Gaskets
    Schoenfeld Headers 0150 S/B Chevy Round Port Exhaust Header Gaskets
    (Part #9170150)
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    Schoenfeld header exhaust gaskets for Small Block Chevy with 1-5/8" diameter round ports.

  • Collector Gasket, 3 Inch I.D.
    Collector Gasket, 3 Inch I.D.
    (Part #5501204)
    x
                Collector gaskets available in several sizes. 
            
  • Dynatech 3-Layer Stainless Steel 6.1L Hemi Header Gaskets, Pair
    Dynatech 3-Layer Stainless Steel 6.1L Hemi Header Gaskets, Pair
    (Part #31179420002)
    x
                

    A great exhaust system starts at the beginning - the flange and gaskets.  Dynatech®'s triple-layer stainless steel exhaust header gaskets are designed to ensure a perfect seal every time. 

    • 3-layer
    • Stainless steel
    • For 6.1L SRT Hemi
  • Copper Collector Exhaust Gaskets, 3 Inch
    Copper Collector Exhaust Gaskets, 3 Inch
    (Part #91013707)
    x
                These copper collector gaskets are embossed port ridge for a perfect seal. Cure the "leaky header blues" with these copper exhaust gaskets. Die cut and dead soft. Constructed of the finest .041 copper material and will seal where most gaskets fail. Include stainless steel fasteners. Reusable.
            
  • Small Block Ford Copper Exhaust Gaskets
    Small Block Ford Copper Exhaust Gaskets
    (Part #91013730)
    x
                

    Copper exhaust gaskets are die cut and dead soft. Embossed port ridge for a perfect seal. Cure the "leaky header blues" with these copper exhaust gaskets. Constructed of the finest .041 copper material and will seal where most gaskets fail. Reusable.

    • 1-3/8" tall x 1-1/8" wide   
    • Overall Length:  16-3/8"
    • Overall Height:  2-1/8"
    • Thickness @ Port Seal:  .095"
  • Dynatech Small Block Chevy Fiber Exhaust Header Gaskets, Spread Port
    Dynatech Small Block Chevy Fiber Exhaust Header Gaskets, Spread Port
    (Part #31179400000)
    x
                

    These Dynatech® header gaskets are manufactured at the highest quality for racing and high performance applications. They are CAD designed for the most precise fit possible. 

    • SBC spread port
    • Quality Fiber construction
    • Sold in pairs
  • Extreme Exhaust Gaskets, Big Block Chevy, 2 Inch Round Port
    Extreme Exhaust Gaskets, Big Block Chevy, 2 Inch Round Port
    (Part #91013520)
    x
                
    • Reusable triple-layer exhaust gasket
    • Stainless steel with a heat-resistant, rubber-based inner core
    • 0.085” thick, ultra pliable
    • Available for many popular flange configurations
    • Easily conforms to surface irregularities to create a tight, leak-proof seal
    • Works well with a wide range of flange surfaces and block and head materials
  • Speedway Small Block Chevy Square Port Exhaust Gaskets
    Speedway Small Block Chevy Square Port Exhaust Gaskets
    (Part #91010211)
    x
                Speedway offers premium quality components & materials and exceeds all sealing requirements established by gasket manufacturers. For Small Block Chevy stock style square port heads.
            
  • Tru-Ram Small Block Chevy Exhaust Manifold Gasket Set
    Tru-Ram Small Block Chevy Exhaust Manifold Gasket Set
    (Part #9300300-3)
    x
                These  header/manifold exhaust gaskets are fabricated   from  large-fiber gasket material bonded by a high-heat resistant   compound.  They are precision die cut for each application, and provide   excellent  sealing and durability. 
    • Gasket set for Tru-Ram SBC exhaust manifolds (930-0301)
    • Large-fiber gasket material
    • High-heat resistant compound
    • Precision die cut for each application
    • Provide excellent sealing and durability
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