Product Summary

Universal Fit, Block Hugger Header Tube Type, Steel

  • Designed to be used with standard exhaust port S/B Chevy heads that have angle spark plugs
  • 1 5/8" primary tubes and 2 1/2" collectors
  • Complete with reducers, gaskets and bolts
  • 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 TypeBlock Hugger
Exhaust Port ShapeRound
Flange StyleStandard
Primary Tube Diameter1-5/8"
Material TypeSteel

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Speedway Motors 9308037H Details

These tight-fit headers are designed to be used with standard exhaust port Small Block Chevy heads that have angle spark plugs. Features 1-5/8" primary tubes and 2-1/2" collectors with 2-1/4" outlets. Comes with bolts, gaskets and reducers. The port openings on the header are round and work fine on heads with round or rectangle ports.

These shorty headers feature our unique Armor Hot Coat® ceramic coating. 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 ceramic coated headers will withstand exhaust temperatures of up to 1300° F.


  1. Can be used with most oil filter systems and transmission/starter combinations.
  2. Does not fit '55-'57 Chevy cars, Camaros, or other modern vehicles which have a crossmember below the engine's center two exhaust ports.



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.

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 9308037H Specifications

MFG. Part #9308037H
BrandSpeedway Motors
Header Tube TypeBlock Hugger
Exhaust Port ShapeRound
Flange StyleStandard
Primary Tube Diameter1-5/8"
Material TypeSteel
Collector Diameter2-1/2 Inch
FinishCeramic Coated
Collector Attachment Type3-bolt flange
Hardware IncludedYes
Gasket(s) IncludedYes
Collector Reducers IncludedYes
Collector Reducer Exit Diameter2.25"
Flange Thickness.32"
Port Height1.55"
Port Width1.5"
Overall Height10.25"
Header Dimension A4.15"
Header Dimension B10.30"
Header Dimension C18.25"
Sold in QuantityPair