Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Products

Mufflers

Shop Oval Track Headers & Exhaust At Speedway Motors

Speedway Motors has racing headers to fit many different chassis, from late models to IMCA Modifieds. We also stock a great selection of header kits, collectors and tubing so you can repair your damaged headers or fabricate a custom set for your application. Speedway can also help you reduce heat and noise with header wraps and racing mufflers.

Featured Products
  • Speedway Shorty Race Mufflers, 8 x 3 Inch
    Speedway Shorty Race Mufflers, 8 x 3 Inch
    (Part #91783030)
    x
                These shorty race mufflers are useful when the rules say you must run a muffler, but do not specify a noise level. All steel construction with no fillers to burn out.
            
  • Speedway Auger Style Muffler
    $14.99
    Product Rating: 4.80 Stars
    Speedway Auger Style Muffler
    (Part #91013984)
    x
                Auger style muffler fits 3" or 3-1/2" diameter pipe.  11" long. Baffle style. Slips inside.       
            
  • Speedway Shorty Race Mufflers, 8 x 3-1/2 Inch
    Speedway Shorty Race Mufflers, 8 x 3-1/2 Inch
    (Part #91783535)
    x
                These shorty race mufflers are useful when the rules say you must run a muffler, but do not specify a noise level. All steel construction with no fillers to burn out.
            
  • Dynatech 772-06352 Torque Booster Mufflers, 3.5 Inch
    New
    Dynatech 772-06352 Torque Booster Mufflers, 3.5 Inch
    (Part #31177206352)
    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
  • Muffler Collector Insert, 3-1/2 Inch
    Muffler Collector Insert, 3-1/2 Inch
    (Part #91743035)
    x
                With its straight-through design, this muffler insert reduces noise without excess back pressure. Lightweight construction with nothing to burn out ensures durability.
            
  • Schoenfeld Headers IMCA609 IMCA Spec Muffler
    Schoenfeld Headers IMCA609 IMCA Spec Muffler
    (Part #91700609)
    x
                Required by IMCA at tracks where you must run mufflers. Inserts into 3" or 3-1/2" collector. Features 9db reduction. 6" long. 
            
  • Muffler Collector Insert, 3 Inch
    Muffler Collector Insert, 3 Inch
    (Part #91742530)
    x
                With its straight-through design, this muffler insert reduces noise without excess back pressure. Lightweight construction with nothing to burn out ensures durability.
            
  • Schoenfeld Headers 112535 Short Muffler
    Schoenfeld Headers 112535 Short Muffler
    (Part #917112535)
    x
                Schoenfeld 112535 short muffler.  Sanction body approved by World of Outlaws, ASCS, SUPRA, UTDRA, Knoxville and All-Stars. 

    3-1/2" inlet, 3-1/2" outlet, 11" long.

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"Oval Track, Mufflers" Page 1 of 4

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  • Dynatech 772-32520 Vortex Insert Cone, 3 Inch
    Dynatech 772-32520 Vortex Insert Cone, 3 Inch
    (Part #31177232520)
    x
                

    Let's face it, open exhaust is a thing of the past! Sound requirements, mandatory mufflers, or maximum db level are found in all forms of racing today. From Mini-Stock to Outlaw Sprint Cars, reducing the sound level is becoming the norm. Today's racers are spending thousands of dollars to go racing. The last thing they want to do is get put on the trailer for too much noise. The Vortex Insert Cone can help you keep on track. That's sound insurance!

    • 100% T-304 stainless steel construction
    • Compact size fits all racing applications
    • Ultra lightweight - less that 1/2 lb. each
    • Little or no power loss
    • Easy bolt-in installation
    • Typically good for a 1-3 reduction in db 

    Typically good for a 1-3 dB reduction.

    How It Works (JPEG)

  • Schoenfeld Headers 103535K Shorty Muffler
    Schoenfeld Headers 103535K Shorty Muffler
    (Part #917103535K)
    x
                This shorty muffler is for use where rules say you must run a muffler, but do not specify a noise level. Has a 4" O.D. body.
            
  • Dynatech 772-32540 Vortex Insert Cones, 4-1/2 Inch
    Dynatech 772-32540 Vortex Insert Cones, 4-1/2 Inch
    (Part #31177232540)
    x
                

    Let's face it, open exhaust is a thing of the past! Sound requirements, mandatory mufflers, or maximum db level are found in all forms of racing today. From Mini-Stock to Outlaw Sprint Cars, reducing the sound level is becoming the norm. Today's racers are spending thousands of dollars to go racing. The last thing they want to do is get put on the trailer for too much noise. The Vortex Insert Cone can help you keep on track. That's sound insurance! 

    Typically good for a 1-3 dB reduction.

    • 100% T-304 stainless steel construction
    • Compact size fits all racing applications
    • Ultra lightweight - less that 1/2 lb. each
    • Little or no power loss
    • Easy bolt-in installation
    • Typically good for a 1-3 reduction in db 

    How It Works (JPEG)

  • Flowmaster 13516101 Hushpower 3 1/2 Inch Race Muffler
    Flowmaster 13516101 Hushpower 3 1/2 Inch Race Muffler
    (Part #37813516)
    x
                

    An increasing number of tracks and sanctioning bodies, including USAC and CRA, require mufflers for certain race classes. Hushpower has designed these Race Mufflers to deliver performance that equals or surpasses open headers.

    They're also lighter than most race mufflers and feature round 6" x 16" aluminized steel cases with stainless steel internals with 3.5" turndown outlets.

  • Dynatech 772-06352 Torque Booster Mufflers, 3.5 Inch
    New
    Dynatech 772-06352 Torque Booster Mufflers, 3.5 Inch
    (Part #31177206352)
    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
  • Flowmaster 15020100 Hushpower Pro Series Race Muffler-5 Inch In/Outlet
    Flowmaster 15020100 Hushpower Pro Series Race Muffler-5 Inch In/Outlet
    (Part #378150201)
    x
                

    An increasing number of tracks and sanctioning bodies require mufflers for certain race classes. Hushpower has designed these Race Mufflers to deliver performance that equals or surpasses open headers. They're also lighter than most race mufflers and feature round aluminized steel cases with stainless steel internals.

  • Flowmaster 14020100 Hushpower Pro Series Race Muffler-4 Inch In/Outlet
    Flowmaster 14020100 Hushpower Pro Series Race Muffler-4 Inch In/Outlet
    (Part #378140201)
    x
                

    An increasing number of tracks and sanctioning bodies require mufflers for certain race classes. Hushpower has designed these Race Mufflers to deliver performance that equals or surpasses open headers. They're also lighter than most race mufflers and feature round aluminized steel cases with stainless steel internals.

  • Speedway Shorty Race Mufflers, 8 x 3-1/2 Inch
    Speedway Shorty Race Mufflers, 8 x 3-1/2 Inch
    (Part #91783535)
    x
                These shorty race mufflers are useful when the rules say you must run a muffler, but do not specify a noise level. All steel construction with no fillers to burn out.
            
  • Dynatech 776-14252 Oval Split Flow Mufflers, 2-1/2 Inch
    Dynatech 776-14252 Oval Split Flow Mufflers, 2-1/2 Inch
    (Part #31177614252)
    x
                

    The Split-Flow racing muffler is the "hot topic" among racers, and for good reason. The exclusive dual pattern core reduces dB level while maintaining a powerful sound. The all-aluminized, full welded construction makes it a top choice for racing and high performance applications. 

    • Straight-thru design for maximum flow
    • Stainless steel sound absorbing material for no burnout
    • Lightweight design (only 7.2 lbs)
    • Meets or exceeds db requirements at most muffler-required sanctioned events
    • Typical 8-10 dB reduction
    • Case Length:  14"
    • Case Width:  7"
    • Case Thickness:  4.5"
  • Flowmaster 13516100 Hushpower Pro Series Race Muffler, .5 In In/Outlet
    Flowmaster 13516100 Hushpower Pro Series Race Muffler, .5 In In/Outlet
    (Part #378135161)
    x
                

    An increasing number of tracks and sanctioning bodies require mufflers for certain race classes. Hushpower has designed these Race Mufflers to deliver performance that equals or surpasses open headers. They're also lighter than most race mufflers and feature round aluminized steel cases with stainless steel internals.

  • Dynatech 772-32510 Vortex Insert Cone, 3-1/2 Inch
    Dynatech 772-32510 Vortex Insert Cone, 3-1/2 Inch
    (Part #31177232510)
    x
                

    Let's face it, open exhaust is a thing of the past! Sound requirements, mandatory mufflers, or maximum db level are found in all forms of racing today. From Mini-Stock to Outlaw Sprint Cars, reducing the sound level is becoming the norm. Today's racers are spending thousands of dollars to go racing. The last thing they want to do is get put on the trailer for too much noise. The Vortex Insert Cone can help you keep on track. That's sound insurance!

    • 100% T-304 stainless steel construction
    • Compact size fits all racing applications
    • Ultra lightweight - less that 1/2 lb. each
    • Little or no power loss
    • Easy bolt-in installation
    • Typically good for a 1-3 reduction in db 

    Typically good for a 1-3 dB reduction.

    How It Works (JPEG)

  • Dynatech 772-06302 Torque Booster Mufflers, 3 Inch
    New
    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
  • Schoenfeld Headers 112535 Short Muffler
    Schoenfeld Headers 112535 Short Muffler
    (Part #917112535)
    x
                Schoenfeld 112535 short muffler.  Sanction body approved by World of Outlaws, ASCS, SUPRA, UTDRA, Knoxville and All-Stars. 

    3-1/2" inlet, 3-1/2" outlet, 11" long.

  • Schoenfeld Headers IMCA930 Muffler 3 Inch O.D., 10 Inch Long
    Schoenfeld Headers IMCA930 Muffler 3 Inch O.D., 10 Inch Long
    (Part #91700930)
    x
                These Schoenfeld 930 mufflers are perfect for tracks with noise reduction rules. They feature a 3 inch inlet/outlet and are 10 inches long.
    • IMCA approved for tracks with noise reduction rules
    • 3" diameter
    • 10" long
  • Flowmaster 53545-10 40 Series Delta Force Alcohol Sprint Car Muffler
    Flowmaster 53545-10 40 Series Delta Force Alcohol Sprint Car Muffler
    (Part #37853545)
    x
                If you are required to run mufflers on your sprint car, Flowmaster is the choice.  Standard style muffler.  All pipe measurements are I.D.
            
  • Dynatech 776-14352 Oval Split Flow Mufflers, 3-1/2 Inch
    Dynatech 776-14352 Oval Split Flow Mufflers, 3-1/2 Inch
    (Part #31177614352)
    x
                

    The Split-Flow racing muffler is the "hot topic" among racers, and for good reason. The exclusive dual pattern core reduces dB level while maintaining a powerful sound. The all-aluminized, full welded construction makes it a top choice for racing and high performance applications. 

    • Straight-thru design for maximum flow
    • Stainless steel sound absorbing material for no burnout
    • Lightweight design (only 7.2 lbs)
    • Meets or exceeds db requirements at most muffler-required sanctioned events
    • Typical 8-10 dB reduction
    • Case Length:  14"
    • Case Width:  7"
    • Case Thickness:  4.5"
  • Schoenfeld Headers IMCA609 IMCA Spec Muffler
    Schoenfeld Headers IMCA609 IMCA Spec Muffler
    (Part #91700609)
    x
                Required by IMCA at tracks where you must run mufflers. Inserts into 3" or 3-1/2" collector. Features 9db reduction. 6" long. 
            
  • Dynatech 776-14302 Oval Split Flow Mufflers, 3 Inch
    Dynatech 776-14302 Oval Split Flow Mufflers, 3 Inch
    (Part #31177614302)
    x
                

    The Split-Flow racing muffler is the "hot topic" among racers, and for good reason. The exclusive dual pattern core reduces dB level while maintaining a powerful sound. The all-aluminized, full welded construction makes it a top choice for racing and high performance applications. 

    • Straight-thru design for maximum flow
    • Stainless steel sound absorbing material for no burnout
    • Lightweight design (only 7.2 lbs)
    • Meets or exceeds db requirements at most muffler-required sanctioned events
    • Typical 8-10 dB reduction
    • Case Length:  14"
    • Case Width:  7"
    • Case Thickness:  4.5"
  • Speedway Auger Style Muffler
    $14.99
    Product Rating: 4.80 Stars
    Speedway Auger Style Muffler
    (Part #91013984)
    x
                Auger style muffler fits 3" or 3-1/2" diameter pipe.  11" long. Baffle style. Slips inside.       
            
  • Dynatech 772-32530 Vortex Insert Cones, 4 Inch
    Dynatech 772-32530 Vortex Insert Cones, 4 Inch
    (Part #31177232530)
    x
                

    Let's face it, open exhaust is a thing of the past! Sound requirements, mandatory mufflers, or maximum db level are found in all forms of racing today. From Mini-Stock to Outlaw Sprint Cars, reducing the sound level is becoming the norm. Today's racers are spending thousands of dollars to go racing. The last thing they want to do is get put on the trailer for too much noise. The Vortex Insert Cone can help you keep on track. That's sound insurance!

    • 100% T-304 stainless steel construction
    • Compact size fits all racing applications
    • Ultra lightweight - less that 1/2 lb. each
    • Little or no power loss
    • Easy bolt-in installation
    • Typically good for a 1-3 reduction in db 

    Typically good for a 1-3 dB reduction.

    How It Works (JPEG)

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