Product Summary

Universal Fit, 10.00" Overall Length, Steel, Natural

  • These muffler inserts will tone down the noise of your lake-style headers
  • 6-sided louvered steel core is wrapped with high-temperature packing for long life
  • Glasspack design provides a period correct sound
  • Large end is 3-5/16" OD to fit inside 3.5" lake-style headers
  • Sold in pairs

Key Specs

MFG. Part #9303845
BrandSpeedway Motors

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Speedway Motors 9303845 Details

Tone down your Lakes Headers with these muffler inserts. These inserts are designed to provide excellent sound control with or without fiberglass packing. Standard inserts feature a heavy-duty, 6-sided louvered steel core that is wrapped with high-temperature packing for long life.

  • Steel Construction
  • Natural Finish
  • Sold in pairs
  • 10" length
  • Outlet/larger end O.D.  is 3-5/16"

Note: May require drilling or welding depending on your configuration

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 9303845 Specifications

MFG. Part #9303845
BrandSpeedway Motors
Speedway Motors Catalog Part #930-3845
Overall Length10.00"
Outside Diameter3.30"
Material TypeSteel
Sold in QuantityEach