Product Summary

396, 402, 427, 454, 496, 502, Chassis Header Tube Type

    Key Specs

    Header Tube TypeChassis
    Exhaust Port ShapeRound
    Flange StyleStandard
    Primary Tube Diameter1-7/8"
    Material TypeSteel

    Need To Know

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    Speedway Motors 930C8 Details

    Classic Chevy owners will love these 396-502 big block V8 chassis headers for 1955-1957 cars. They have 34"-36" primary tubes for lots of power, but they're tucked close to the body for maximum ground clearance. Requires aftermarket side engine mounts and a rear trans crossmember (rather than stock bellhousing mounts).

    • Mid-length design offers maximum ground clearance, even if car is lowered 4"
    • Works with automatic transmissions only
    • Designed to work with stock steering or 605 power steering box
    • Original bellhousing frame mounts must be removed
    • Will NOT work if engine is set forward more than 3/4" for firewall/HEI distributor clearance
    • Will NOT fit tall-deck (truck) blocks
    • Includes a pair of reducers (3.00" to 2.50")

    Note: These headers will not work with manual transmissions due to clutch linkage issues.


    1. Will not fit if engine is located more than 3/4” forward for HEI firewall clearance. Fits with TCI engine mount kit PN 725-7005-80 and with the equivalent Danchuk mounts.
    2. Header is designed to fit cars using original V-8 pitman arm part number 3719487 not 6 cylinder pitman arm number 3709877. Aftermarket pitman arms must be same configuration as OE for proper header fit.
    3. Works with A/C, P/B, P/S, and A/T (both column and floor shifters).


    Guides & Documents

    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.

    Speedway Motors 930C8 Specifications

    MFG. Part #930C8
    BrandSpeedway Motors
    Header Tube TypeChassis
    Exhaust Port ShapeRound
    Flange StyleStandard
    Primary Tube Diameter1-7/8"
    Material TypeSteel
    Collector Diameter3 Inch
    Collector Attachment Type3-bolt flange
    Hardware IncludedYes
    Gasket(s) IncludedYes
    Collector Reducers IncludedYes
    Collector Reducer Exit Diameter2.5"
    Collector Length5.75"
    Flange Thickness.38"
    Port Height1.93"
    Port Width1.93"
    Drivers Side Dimension A10.1"
    Drivers Side Dimension B13"
    Drivers Side Dimension C35.38"
    Passenger Side Dimension A9.9"
    Passenger Side Dimension B14.35"
    Passenger Side Dimension C41.13"
    Sold in QuantityPair