Product Summary

LM4, LM7, LQ4, LQ9, LR4, LS1, LS2, LS6, Ceramic Coated

  • Feature 1 3/4" primary tubes and 3" collectors
  • Oxygen sensor bung welded to collectors
  • 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 TypeMid-Length
FinishCeramic Coated
Flange StyleStandard
Primary Tube Diameter1-3/4"
Material TypeSteel

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Speedway Motors 930C46H Details

These headers allow you to install the popular LS1 engine in your 1955-1957 Chevy car. They feature 1-3/4" primary tubes and 3" collectors. Oxygen sensor bung welded to collectors. These ceramic coated headers provide superior performance and durability.

Note: These headers will not clear motor mount part number 720-4501.



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 930C46H Specifications

MFG. Part #930C46H
BrandSpeedway Motors
Header Tube TypeMid-Length
FinishCeramic Coated
Flange StyleStandard
Primary Tube Diameter1-3/4"
Material TypeSteel
Exhaust Port ShapeRound
Collector Diameter3 Inch
Hardware IncludedYes
Gasket(s) IncludedYes
Collector Attachment Type3-bolt flange
Collector Reducers IncludedYes
Collector Reducer Exit Diameter2.5"
Collector Length7"
Flange Thickness.31"
Port Height1.73"
Port Width1.73"
Drivers Side Dimension A8.25"
Drivers Side Dimension B15.5"
Drivers Side Dimension C23.75"
Passenger Side Dimension A7.95"
Passenger Side Dimension B15.05"
Passenger Side Dimension C24.13"
Sold in QuantityPair
NotesIncludes a pair of reducers (3.00" to 2.50")