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Product Summary

396, 402, 427, 454, 496, 502, Ceramic Coated, Steel

  • Fit 396 to 502 big block Chevy V8's in 1955-57 Chevy cars with engine in stock location
  • AHC ceramic coating provides high temperature corrosion protection that not only looks good but also reduces under hood temperatures
  • These headers kick up over the frame rail and exit at the bottom of the cowl making them perfect for Gasser-style hot rods and drag cars
  • Feature long primary tubes that help produce more horsepower and torque than shorter more compact headers
  • Collector outlet is 3 .5" and also included are 2.5" reducers for attaching an exhaust system if desired

Key Specs

MFG. Part #930C4H
BrandSpeedway Motors
Header Tube TypeFenderwell
FinishCeramic Coated
Material TypeSteel

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Details

These fender well headers provide the ultimate performance for 396-502 big block Chevy V8s in 1955-57 Chevy car applications. They kick up over the frame rail and exit just at the bottom of the cowl, which makes them perfect for Gasser-style rods and drag cars. These headers feature long primary tubes that help produce more horsepower and torque than shorter, more compact headers. Plus, the AHC ceramic coating provides additional horsepower gains along with decreased heat soak of other engine components.

These headers are not for the faint of heart since you must cut the inner fender panels to make them fit, and tire clearance can be a problem on some applications. They may require smaller front tires to avoid contact. The stock emergency brake rod must also be altered. Can be used with most oil filter systems or transmission and starter combinations. The headers are designed to be used with engines in the stock location, not lowered as many kits do, so all '55-'57 cars should check motor mount positioning before ordering.

  • Header flange has 1-13/16” x 1-13/16" port size
  • Will require fender well cutting or alteration
  • 2" primary tube O.D.
  • 32" primary tube length
  • 3-1/2" collector tube O.D.
  • Polished ceramic coated finish
  • Includes bolts and gaskets

Note: This header actually goes upward from the head instead of down before dropping over the frame rails. From the top of the head flange to the top of the tubes is approximately 9-1/2".  

Charts

Warranties

Armor Hot Coating (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.

AHC coated headers will burn and be damaged at exhaust temperatures above 1300 degrees. An excessively lean fuel mixture can generate exhaust temperatures over 1700-1900 degrees. If the coating is burned (which will look like a dull gray) due to a lean condition, it is not warrantied, but the headers can be recoated.

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 #930C4H
BrandSpeedway Motors
Header Tube TypeFenderwell
FinishCeramic Coated
Material TypeSteel
GENERAL
Flange StyleStandard
Primary Tube Diameter2"
ColorSilver
Weld-UpNo
Exhaust Port ShapeRound
Collector Diameter3-1/2 Inch
Collector Length7.75"
Flange Thickness.37"
Port Height1.90"
Port Width1.90"
Drivers Side Dimension A24.75"
Drivers Side Dimension B10.00"
Drivers Side Dimension C28.00"
Passenger Side Dimension A26.00"
Passenger Side Dimension B12.00"
Passenger Side Dimension C25.50"
Hardware IncludedYes
Gasket(s) IncludedYes
Sold in QuantityPair
NotesIncludes 3.50" to 2.50" reducers.
Collector Attachment Type3-bolt flange
Collector Reducers IncludedYes
Collector Reducer Exit Diameter2.5"