Product Summary

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

  • Will fit '55-'57 Chevy big block 396-502
  • Steel construction, ceramic coated
  • 3" collector
  • Offers maximum ground clearance
  • Armor Hot Coat® is a Speedway Motors custom ceramic heat proof coating that will keep the finish of these headers looking great for years to come

Key Specs

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

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Speedway Motors 930C8H Details

Classic Chevy owners will love these 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.  The manufacturer says that they won't work with manual transmissions due to clutch linkage issues!  These headers are finished with our Armor Hot Coating.

  • Quality steel construction
  • Mid-length design offers maximum ground clearance, even if car is lowered 4"


Armor Hot Coat® (AHC) is a heat resistant, ceramic coating applied to the outside of the header. This coating will reflect heat, which helps retain more heat within the header tube while simultaneously speeding up the exhaust flow. Not only will this coating help you make more horsepower, it also keeps your headers rust-free, looking great, and lasting longer (when properly maintained). If you are looking for a show-quality finish for your headers, this is it! Our AHC will withstand exhaust temperatures of up to 1300¢ª F.


  • Fits automatic transmissions
  • The manufacturer says that they won't work with manual transmissions due to clutch linkage issues!
  • Designed to work with 605 power steering box
  • Will not work if engine is set forward more than 3/4" for firewall/HEI distributor clearance
  • Won't fit tall-deck (truck) blocks
  • Needs aftermarket side mounts and a rear trans crossmember (rather than stock bellhousing mounts)



These headers do not fit angle-plug heads. The manufacturer says they will not work with 168-tooth flywheels or with some aftermarket-style starters. They will not work on side-style engine mount conversions that move the engine forward for distributor clearance.

AHC Warning: AHC coatings will burn and be damaged at exhaust temperatures over 1300 degrees. A lean fuel mixture can generate exhaust temperatures exceeding 1700-1900 degrees. If the coating is damaged due to a lean condition, the coating will not be warranted, but can be recoated for a fee.

Not legal for sale or use in California on pollution controlled vehicles


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 930C8H Specifications

MFG. Part #930C8H
BrandSpeedway Motors
Header Tube TypeChassis
Exhaust Port ShapeRound
Flange StyleStandard
Primary Tube Diameter1-7/8"
Material TypeSteel
Collector Diameter3 Inch
FinishCeramic Coated
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
NotesIncludes a pair of reducers (3.00" to 2.50")