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Product Summary

283, 302, 305, 307, 327, 350, 377, 383, 395, 400, Raw

  • Speedway headers allow you to keep the exhaust system under your '55-'57 Chevy car
  • Provides more ground clearance than full-length headers, yet makes more power than "shorty" style
  • These chassis headers fit 283-400 S/B Chevy V8s
  • Has 1-5/8" primary tubes with 2-1/2" collectors

Key Specs

MFG. Part #930C7
BrandSpeedway Motors
Header Tube TypeChassis
FinishRaw
Material TypeSteel

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Details

These Speedway headers allow you to keep the exhaust system under your '55-'57 Chevy car. The "3/4-length" design provides more ground clearance than full-length headers, yet makes more power than "shorty" style headers. These chassis headers fit 283-400 S/B Chevy V8s and has 1-5/8" primary tubes with 2-1/2" collectors.

  • Mid-length design offers maximum ground clearance
  • Designed to work with stock or 605 power steering box
  • Fits cars using an original V-8 pitman arm (some aftermarket arms may cause an interference)
  • Will work with side engine mounts with engine in stock location
  • Fits standard and Vortec-style small-block Chevy heads (not D-port, LT-1 or ZZ-4)
  • Does not work with stock clutch linkage
  • The use of a shorty spark plug may aide in clearance between the plug wire and header primary tubes

Includes a pair of reducers (2.50" to 2.25").

  • Drivers side A dimension is 3-1/2" up by the head and 5-5/8" at the collector
  • B dimension is 15", and C dimension is 21"
  • Passenger side A dimension is 4" at the head and 6-5/8" at the collector, B is 15", and C is 21"

Charts

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

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, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. 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.

Specifications

KEY SPECS
MFG. Part #930C7
BrandSpeedway Motors
Header Tube TypeChassis
FinishRaw
Material TypeSteel
GENERAL
Flange StyleStandard
Primary Tube Diameter1-5/8"
ColorNatural
Weld-UpNo
Exhaust Port ShapeOval
Collector Diameter2-1/2 Inch
Collector Length4"
Flange Thickness.35"
Port Height1.66"
Port Width1.38"
Drivers Side Dimension A5.35"
Drivers Side Dimension B15.20"
Drivers Side Dimension C21.00"
Passenger Side Dimension A6.50"
Passenger Side Dimension B14.25"
Passenger Side Dimension C22.75"
Hardware IncludedYes
Gasket(s) IncludedYes
Sold in QuantityPair
Collector Attachment Type3-bolt flange
Collector Reducers IncludedYes
Collector Reducer Exit Diameter2.25"