Product Summary

Chevy LS V8, 2004R, 700R4, Powerglide, TH350, Steel

  • This flexplate allows the use of GM TH350, 700R4, 200-4R, 4L60, and Powerglide transmissions with Gen III LS engines
  • Works with 10.75" and 11.066" (11.1") torque converter bolt patterns
  • Works with factory LS starter to reduce conversion costs
  • Features double welded ring gears for added durability
  • .035" thicker than stock which meets SFI 29.1 certification

Key Specs

MFG. Part #57534610
BrandSpeedway Motors
SFI Rating29.1
Material TypeSteel

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Speedway Motors 57534610 Details

Make your Gen III LS swap a breeze with this flexplate adapter for GM automatic transmission. These platinum series flexplates are engineered to handle extreme duty applications and designed to take the punishment of today's high horsepower Gen III engines. The 4mm thick centerplate provides a solid foundation (that's 0.035" thicker than stock). Ring gears are precision welded to meet SFI 29.1 specifications, utilizing robotic cold-welding processes. These flex plates are inspected throughout the manufacturing cycle to ensure a high quality, safe end product.

  • SFI 29.1 certified
  • Direct bolt on for Gen III LS engines w/ "short" crank flange
  • Adapts to GM TH350/700R4/2004R/4L60/Powerglide transmissions
  • Works with 10.75" & 11.066" (11.1") bolt-pattern torque converters
  • Constructed from cold-rolled premium steel
  • 0.035" thicker than stock flexplates
  • Long lasting gold iridited finish prevents rust
  • Forged 1-piece steel ring gear w/ 168 teeth
  • Features double welded ring gears for added durability
  • Works with factory LS starter motor

For 1997-07 GM LS1/LS6 engines (up to '09 for LS2) and 4.8/5.3/6.0 truck engines including L33, L59, LM4, LM7, LQ4, LQ9, and LR4. Adapts all of these engines to TH350, 700R-4, 200-4R, 4L60 and Powerglide transmissions that originally came behind a non-LS engine (such as a SBC or BBC V8).

Speedway Motors 57534610 Specifications

MFG. Part #57534610
BrandSpeedway Motors
SFI Rating29.1
Material TypeSteel
Tooth Count168
Bolt Hole Pattern10.75" and 11.066"
Sold in QuantityEach