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Founder, 1929-2014
Speedy Bill
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Products

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 711-36410 Dirt Late Model 604 Crate Header
    Dynatech 711-36410 Dirt Late Model 604 Crate Header
    (Part #31171136410)
    x
                

    This dirt late model 604 Crate header has flanges that are designed to match the 604 Crate cylinder head port. They feature 1.625" -  1.750" stepped tubes with a 3.00" collector. 

    • Specifically designed for the 604 Crate Engines
    • 1 Year Warranty
    • Machined surfaced flanges
    • Constructed of 17 gauge tubing
    • Fits: Fast, GRT, Shaw and others with 5/8" offset
  • Dynatech Header Bolts, 3/8 x 3/4 Inch, Pack/12
    Dynatech Header Bolts, 3/8 x 3/4 Inch, Pack/12
    (Part #31179400112)
    x
                

    Dynatech® has a wide variety of header bolts to fit your heads.

  • Dynatech 794-03006 Musclemaxx S/B Chevy A/C Mounting Bracket
    Dynatech 794-03006 Musclemaxx 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 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 711-25910 Dirt Late Model 604 Crate Header Kit
    Dynatech 711-25910 Dirt Late Model 604 Crate Header Kit
    (Part #31171125910)
    x
                

    This dirt late model 604 crate engine header kit has flanges that are designed to match the 604 Crate cylinder head ports. This kit includes Headers with an 80 degree elbow and a 14" extension.

    • 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: Bernheisel, Dirt Tek, Lazer, Mastersbilt, Rayburn, and Warrior

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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 Header Bolts, M8 x 1.25 mm, Pack/12
    Dynatech Header Bolts, M8 x 1.25 mm, Pack/12
    (Part #31179450112)
    x
                

    Dynatech® has a wide variety of metric header bolts to fit your heads.

  • 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 Block Chevy LT1
    Dynatech 761-10001 Header Exhaust Gasket Set - Small Block 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 Header Bolts, 3/8 x 3/4 Inch, Pack/12
    Dynatech Header Bolts, 3/8 x 3/4 Inch, Pack/12
    (Part #31179400112)
    x
                

    Dynatech® has a wide variety of header bolts to fit your heads.

  • 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 IMCA Modified Headers, Angled Adj, 1-5/8 - 1-3/4, 3 Collector
    Dynatech IMCA Modified Headers, Angled Adj, 1-5/8 - 1-3/4, 3 Collector
    (Part #31170110110)
    x
                
    • Fits angle or straight plug heads
    • For Standard Chevy or Crate Engine applications
    • Gaskets, bolts and hardware included

    Header Dimension Chart

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