Product Summary

TH350, 12.875" Outside Diameter, 153 Tooth Count, Steel

  • 153 tooth flexplate for internally balanced 350 Chevy engines
  • Requires balancing plate when used on a 383, 400 and 454
  • This piece features a 2 1/2" I.D. center hole
  • Flywheel measures 0.342" from the engine side of the ring gear to the crank face
  • Has a natural steel finish

Key Specs

MFG. Part #91048359
BrandSpeedway Motors

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SFI rated 153 tooth flex plate for internally balanced Chevy 350 engines. Requires balancing plate for use on 383, 400 and 454.

Has 2 1/2" I.D. center hole.

Make sure you choose the correct flywheel for your application by reading our tech article. Small Block Chevy - How to Choose a Flexplate.

Item Details

SFI Certified

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.


MFG. Part #91048359
BrandSpeedway Motors
Outside Diameter12.875"
Tooth Count153
Hole Diameter2.50"
SFI Rating29.1
Material TypeSteel
Sold in QuantityEach
NotesFor internally balanced Chevy 350, requires balancing plate for 383, 400, 454. Measures 0.342" from the engine side of the ring gear to the crank face.