Product Summary

262, 283, 305, 350, 383, 400, Chassis Header Tube Type

  • Fits S/B Chevy
  • Stepped header
  • 1 5/8" to 1 3/4" primary, 3" collector
  • Includes 90 degree and 60 degree collectors, adjustable for power tuning and footbox location
  • Includes gaskets and header bolts

Key Specs

Header Tube TypeChassis
Flange StyleStandard
Primary Tube Diameter1-5/8"
Material TypeSteel

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Speedway Motors 91013168 Details

Get your Modified breathing better and making maximum power for less money with Speedway adjustable IMCA headers. The stepped header design has adjustable-length primaries to allow for power tuning and variances in engine and foot box location. Adjustable pipe length allows you to shorten headers to work better on longer tracks, or leave pipes long for optimum performance on short tracks.

  • Quality construction with black steel finish
  • All the features of more expensive headers, without the high price tag
  • Adjustable-length primary pipes for performance tuning
  • Pipe length can be adjusted for foot box and engine location
  • Fits IMCA Modifieds with a S/B Chevy standard exhaust port pattern
  • Includes gaskets and header bolts
  • 60-degree turnout on driver's side
  • 90-degree turnout on passenger side



CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Speedway Motors 91013168 Specifications

MFG. Part #91013168
BrandSpeedway Motors
Header Tube TypeChassis
Flange StyleStandard
Primary Tube Diameter1-5/8"
Material TypeSteel
Exhaust Port ShapeRound
Collector Diameter3 Inch
Hardware IncludedYes
Gasket(s) IncludedYes
Collector Attachment TypeSlip fit
Collector Reducers IncludedNo
Collector Length7.5"
Flange Thickness.31"
Port Height1.51"
Port Width1.51"
Sold in QuantitySet