Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop Dynatech Products At Speedway Motors

Dynatech Headers continue to be the exhaust leader in all forms of racing and high performance applications. Advances in racing, engineering, and design have allowed Dynatech to continue to lead the pack with their Dynatech Headers and Dynatech Exhaust systems. Find a full selection of Dynatech parts at Speedway Motors!

Featured Products
  • Dynatech® 711-25810 Dirt Late Model 604 Crate Header Kit
    Dynatech® 711-25810 Dirt Late Model 604 Crate Header Kit
    (Part #31171125810)
    x
                This dirt late model 604 crate engine header kit features an 80 degree elbow with a 14 inch extension. This kit has flanges that are designed to match the 604 cylinder head port.
    • 1.625" - 1.750" stepped tube with a 3.00" collector
    • Specifically designed for the 604 Crate Engines
    • 1 year warranty
    • Machined surfaced flanges
    • Constructed of 17 gauge tubing
    • Fits: American Made, Barry Wright, Bullitt, Morris, Rocket, Swartz, and others with a 2-5/8" offset

     

  • Dynatech® 785-10094 02/Pan E-Vac 18mm Plug Only
    Dynatech® 785-10094 02/Pan E-Vac 18mm Plug Only
    (Part #31178510094)
    x
                Dynatech® 02/Pan E-Vac 18mm plug for the U-weld kit that features an 18mm threaded bung that accepts a standard O2 sensor found on EFI applications. 

    One plug required per collector.

  • Dynatech® 794-00112 Header Bolts, 3/8-16 x 3/4 Inch, Pack/12
    Dynatech® 794-00112 Header Bolts, 3/8-16 x 3/4 Inch, Pack/12
    (Part #31179400112)
    x
                

    These Dynatech® 3/8"-16 x 3/4" header bolts are a perfect fit for bolting headers onto your AMC 290-401, small block Chevy 262-400, big block Chrysler 383-400 (exc. 426 Hemi), Pontiac 326-455, and Oldsmobile 330-455.

  • Dynatech® 794-03006 Muscle Maxx S/B Chevy A/C Mounting Bracket
    Dynatech® 794-03006 Muscle Maxx S/B Chevy A/C Mounting Bracket
    (Part #31179403006)
    x
                Dynatech® has introduced a convenient and  clutter-free way to mount the OEM air conditioning compressor on your  small block Chevy. Kit includes bracket and two mounting bolts.
            
  • Dynatech® 604 Crate Engine Modified Headers
    New
    Dynatech® 604 Crate Engine Modified Headers
    (Part #31170116110)
    x
                

    These modified race headers are engineered for use with 604 Crate Engines. They are specially designed with a port to get the most power out of your crate engine.

    • These headers fit Harris, Skyrocket, Hughes, Victory, BMS, J Car, Jet, and Sardeson style chassis
    • CNC laser cut flanges and optimized tube length for efficient performance
    • Constructed of 17 gauge steel
    These 604 Crate Engine Modified Headers have been designed specifically for use with 604 Crate Engines. Special designed port to get the most power out of your Crate Engine. Built to fit Harris, Skyrocket, Hughes, Victory, BMS, J Car, Jet and Sardeson style chassis. CNC Laser Cut Flanges and optimized tube length for best overall performance.  17 gauge steel construction and surfaced flanges make this a durable header that remains leak free for multiple racing seasons.  Comes standard with a Full One Year Warranty.  ½ sets (Crash Replacements) are also available. - See more at: http://www.afcodynapro.com/Dynatech®/925945806#sthash.fPjMVO3H.dpuf
    These 604 Crate Engine Modified Headers have been designed specifically for use with 604 Crate Engines. Special designed port to get the most power out of your Crate Engine. Built to fit Harris, Skyrocket, Hughes, Victory, BMS, J Car, Jet and Sardeson style chassis. CNC Laser Cut Flanges and optimized tube length for best overall performance.  17 gauge steel construction and surfaced flanges make this a durable header that remains leak free for multiple racing seasons.  Comes standard with a Full One Year Warranty.  ½ sets (Crash Replacements) are also available. - See more at: http://www.afcodynapro.com/Dynatech®/925945806#sthash.fPjMVO3H.dpuf
  • Dynatech® 785-10097 02/Pan E-Vac 18mm Weld Bung Only
    Dynatech® 785-10097 02/Pan E-Vac 18mm Weld Bung Only
    (Part #31178510097)
    x
                This features a U-weld 18mm threaded bung that will  also accept a standard O2 sensor found on EFI applications.

    One weld bung required per collector.

  • Dynatech® T-Shirt
    From: $12.99
    Dynatech® T-Shirt
    (Part #10689088)
    x
                Sound Performance. Size S-3XL.
            
  • Dynatech® 772-06302 Torque Booster Mufflers, 3 Inch
    Dynatech® 772-06302 Torque Booster Mufflers, 3 Inch
    (Part #31177206302)
    x
                

    These anti-reversion torque booster mufflers from Dynatech® balances the exhaust system and helps to keep exhaust gases from contaminating the intake charge. They help increase power and torque at part throttle.

    • Steel Construction
    • Painted Finish
    • Sold Individually

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  • Dynatech® 785-10093 02/Pan E-Vac 18mm Sealing Washers (Pair)
    Dynatech® 785-10093 02/Pan E-Vac 18mm Sealing Washers (Pair)
    (Part #31178510093)
    x
                

    Dynatech® 02/Pan E-Vac 18mm sealing washers for the U-weld kit that features an 18mm threaded bung that accepts a standard O2 sensor found on EFI applications.

    • Sold as a pair of two washers. 
    • One pair required per collector.
  • Left Side Crash Replacement Dirt Late Model Header, Spread Port Flange
    Left Side Crash Replacement Dirt Late Model Header, Spread Port Flange
    (Part #31171215411)
    x
                

    Left hand side crash replacement Dirt Late Model Headers with Spread Port Flange for American Made, Barry Wright, Bullitt, Morris, Rocket, Swartz and others with 2 5/8" offset & 6" setback.

    Tube Size: 1.750"-1.875"

  • Dynatech® 780-14630 Elbow Kit w/ Hardware, 3 Inch Tube Clamps
    Dynatech® 780-14630 Elbow Kit w/ Hardware, 3 Inch Tube Clamps
    (Part #31178014630)
    x
                

    Designed to best work with Dynatech® pavement late model economy crossover headers.

    Kit Includes:

    • (4) 3" elbows: 
      • (1) 42 degree, 8.50" long
      • (1) 60 degree, 12.88" long
      • (1) 42 degree, 12.50" long
      • (1) 30 degree, 13.63" long

    • (4) tube clamps and hardware

  • Left Side Crash Replacement IMCA Mod. Header, 1-3/4 Inch, Small Block Chevy
    Left Side Crash Replacement IMCA Mod. Header, 1-3/4 Inch, Small Block Chevy
    (Part #31170118811)
    x
                

    Left hand side crash replacement headers for Modified design for GRT, Kosiski, Smileys and TRE.

    Tube Size: 1.75"

    Application: Small Block Chevy  

  • Dynatech® 790-00100 Ceramic Coating Option for Headers
    Dynatech® 790-00100 Ceramic Coating Option for Headers
    (Part #31179000100)
    x
                

    Great option for increasing the life, horsepower and appearance of your new Dynatech®s. All headers purchased with this option are coated inside and outside. The coating will significantly reduce the underhood temperature of your car - which translates into a small horsepower gain, not to mention it it makes those headers look great! Headers purchased with this ceramic coating come with a lifetime rust-through warranty and a customer satisfaction guarantee.

    Note: This option can only be ordered in conjunction with Factory Shipped Dynatech® products. 

  • Dynatech® 794-50112 Header Bolts, M8 x 1.25mm, Pack/12
    Dynatech® 794-50112 Header Bolts, M8 x 1.25mm, Pack/12
    (Part #31179450112)
    x
                

    These Dynatech® M8 x 1.25mm Metric header bolts are a perfect fit for bolting headers to your GM LS1, LS2, LS3, LS6, LS7 or Vortec 4.8L, 5.3L, 6.0L, 6.2L engines.

  • Dynatech® 794-60207 Mild Steel J-Bend, 2-1/4 Inch
    Dynatech® 794-60207 Mild Steel J-Bend, 2-1/4 Inch
    (Part #31179460207)
    x
                

    Dynatech® stocks a complete inventory of mandrel bent J-bends. These are made from premium grade mild steel tubing. The bend radius of each tube is 1.5 times the O.D. of the tubing.

  • Dynatech® 761-10001 Header Exhaust Gasket Set- Small Blcok Chevy LT1
    Dynatech® 761-10001 Header Exhaust Gasket Set- Small Blcok Chevy LT1
    (Part #31176110001)
    x
                Small block Chevy header exhaust gaskets for GM LT1 motors.
            
  • Dynatech® Late Model Exhaust, 1-3/4 to 1-7/8 Inch, Std. Chevy 550+Hp
    Dynatech® Late Model Exhaust, 1-3/4 to 1-7/8 Inch, Std. Chevy 550+Hp
    (Part #31171141010)
    x
                

    Dynatech® pavement car exhaust systems start with Dynatech®’s 35” equal length headers. Although difficult to construct, equal length headers deliver maximum torque and horsepower and are used by the best drivers and teams in the country.

    All Dynatech® headers are built with CNC laser machined flanges. With port holes accurate to .003” and total warp less than .025”, you can be assured that you will get all the performance and quality possible from your headers.

    • CNC laser-cut flange
    • Built to fit with proper clearance
    • Optimized tube length for power
    • 35" equal length primaries for maximum torque and horsepower
    • Valve covers are removable with headers installed
    • Removable collectors
    • Tube Size: 1-3/4" - 1-7/8"
    • HP Range: 550 +

    Header Dimension Chart

  • Left Side Crash Replacement Late Model Header, Ford N351, 1-5/8 - 1-3/4 Inch
    Left Side Crash Replacement Late Model Header, Ford N351, 1-5/8 - 1-3/4 Inch
    (Part #31171060011)
    x
                

    Left hand side crash replacement Late Model Ford N351 Headers.

    Tube Size: 1 5/8" - 1 3/4"

    Application:  Late Model Ford N351

  • Dynatech® Big Block Chevy Two Step Dragster headers, 2-3/8 - 2-1/2
    Dynatech® Big Block Chevy Two Step Dragster headers, 2-3/8 - 2-1/2
    (Part #31175099410)
    x
                

    Get the most out of your high performance engine with these drag racing headers from Dynatech®.  Sold as a pair, these stepped primary headers feature 360° gusset supports for increased durability and all come with a beautiful chrome finish.

    • Stepped 2-3/8" - 2-1/2" tubes
    • 4-1/2" merge collector included
    • Equal length for superior acceleration
    • Large radius, CNC mandrel bent
    • CNC laser cut flanges for superior fit
    • Chrome finish
    • For BBC Pro Stock, Comp, S/G, or Strut Front car
  • Dynatech® Stainless Steel LS Header Flange, 1.940 Inch Port, 3/8 Thick
    Dynatech® Stainless Steel LS Header Flange, 1.940 Inch Port, 3/8 Thick
    (Part #31179616061)
    x
                A great exhaust system starts at the begining - the exhaust manifold flange. One of Dynatech®s  biggest advantages is the wide selection of port machined flanges. All the header flanges are CNC laser machined for unparalleled quality and fit. 
    • For GM LS1 V-8 engines
    • Flanges are sold individually
    • Use with Stainless Gaskets
  • SuperMaxx 2006-2008 Dodge Ram 1500 2WD/4WD Intermediate Tubes w/ Cats
    SuperMaxx 2006-2008 Dodge Ram 1500 2WD/4WD Intermediate Tubes w/ Cats
    (Part #31172484720)
    x
                

    Gain 17 HP and 15 Ft. Lbs. over the factory exhaust system! Dynatech® SuperMaxx stainless steel exhaust systems are engineered to give your Dodge Ram 1500 2WD maximum performance both on and off road. Designed to be a direct replacement fit for restrictive factory exhaust and catalytic converter systems, these systems are a great way to get that extra power you are looking for.

    • System Tube Size: 2-1/2"
    • Material: All Stainless Steel
    • OBD II Compliant: Yes
    • Hardware Included: Gaskets, Bolts, O2 Extensions
    • Fit: Direct Bolt-Up to any factory or aftermarket cat back

    2006-2008 Instructions (PDF)

  • Dynatech® 794-00112 Header Bolts, 3/8-16 x 3/4 Inch, Pack/12
    Dynatech® 794-00112 Header Bolts, 3/8-16 x 3/4 Inch, Pack/12
    (Part #31179400112)
    x
                

    These Dynatech® 3/8"-16 x 3/4" header bolts are a perfect fit for bolting headers onto your AMC 290-401, small block Chevy 262-400, big block Chrysler 383-400 (exc. 426 Hemi), Pontiac 326-455, and Oldsmobile 330-455.

  • Dynatech® Small Block Chevy 23 Deg. Header Flange, 3/8 Thick, 1.63 Port
    Dynatech® Small Block Chevy 23 Deg. Header Flange, 3/8 Thick, 1.63 Port
    (Part #31179600622)
    x
                

    A great exhaust system starts at the begining - the exhaust manifold flange. One of Dynatech®s biggest advantages is the wide selection of port machined flanges.  All the header flanges are CNC laser machined for unparalleled quality and fit.

    • Flanges are sold individually
    • Use with Fiber Gaskets (part number 31179400001)
     

     

  • Dynatech® Plain Steel Slip-On Collector, 2-1/8 x 3-1/2 x 8 Inch
    Dynatech® Plain Steel Slip-On Collector, 2-1/8 x 3-1/2 x 8 Inch
    (Part #31178360835)
    x
                Dynatech® slip-on race collectors offer great performance at an affordable  price. Changing  collector outlet size or length are popular ways to make tuning adjustments as  track conditions change (i.e. changing to a larger collector outlet size can aid  in "slick track" conditions).  
    • Race-ready to bolt on right out of the box
    • U-tabs are a direct bolt-on fit to all Dynatech® Drag Headers
    • Hi-temp black paint
    • Long-transition 4-into-1 design for maximum power
    • Listed by Primary I.D. x Collector O.D. x Length
    • Sold individually

    Note: O2 bung not included.

  • Dynatech® Ceramic Coated Slip-On Collector, 2-3/8 x 4 x 12 Inch
    Dynatech® Ceramic Coated Slip-On Collector, 2-3/8 x 4 x 12 Inch
    (Part #31178381241)
    x
                

    Dynatech® slip-on race collectors offer great performance at an affordable price. Changing collector outlet size or length are popular ways to make tuning adjustments as track conditions change (i.e. changing to a larger collector outlet size can aid in "slick track" conditions).

    • Direct bolt-on fit to all Dynatech® Drag Headers
    • Durable Ceramic coating
    • Long-transition 4-into-1 design for maximum power
    • 18mm accessory bung (see Notes)
    • Listed by Primary I.D. x Collector O.D. x Length
    • Sold individually
  • SuperMaxx 1998-02 Camaro/Trans Am Intermediate Tubes w/o Cats
    SuperMaxx 1998-02 Camaro/Trans Am Intermediate Tubes w/o Cats
    (Part #31171573230)
    x
                

    Gain up to 19 HP and 15 Ft. Lbs. over the factory exhaust system! Dynatech® SuperMaxx stainless steel exhaust systems are engineered to give your car winning performance both on and off the track. Designed to be a direct replacement fit for restrictive factory exhaust and catalytic converter systems, these systems are a great way to get that extra power you are looking for.

    • 3/8" laser-cut and machine-ground flanges for a long-lasting, tight seal
    • Computer-designed collectors for maximum air flow
    • Low-profile four-bolt collectors
    • "OEM-style" triple-layer stainless steel gaskets included for long-term, leak-free service

    Fits 1998-1999 and 2000-2002 Chevy Camaro and Pontiac Firebird LS1 (4th Gen. F-Body).

    Warning: Will NOT fit convertible models

    311-71573210 Instructions (PDF)

    311-71573310 Instructions (PDF)

     

  • Left Side Crash Replacement Pierce Mod. Header, 1-3/4 - 1-7/8 In., Spread Port
    Left Side Crash Replacement Pierce Mod. Header, 1-3/4 - 1-7/8 In., Spread Port
    (Part #31170219911)
    x
                

    Left hand side crash replacement Pierce Modified Header with spread port.

    Tube Size: 1.750"-1.875"

    Application: Small Block Chevy 

  • 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.

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