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GM Gen III LS V8 Flexplate Adapter Kit, Includes Flexplate, Torque Converter Adapter Sleeve, Flexplate Bolts, and Torque Converter Bolts, Fits TH350/700R4

4.3 (8) Write Review
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$169.99

$ 83 .99 $83.99

In Stock
  • Complete Kit: This kit provides all the parts required to bolt a GM TH350, 700R4, 200-4R, or Powerglide transmission behind a Gen III LS engine. Includes a flex plate, torque converter adapter sleeve, flex plate bolts, and torque converter bolts.
  • Versatile Compatibility: Works with 10.75" and 11.066" (11.1") torque converter bolt patterns, and factory LS starter to reduce conversion costs. Fits 1997-07 GM LS1/LS6 engines and 4.8/5.3/6.0 truck engines including L33, L59, LM4, LM7, LQ4, LQ9, and LR4.
  • High-Quality Flex Plate: Flex plate is .035" thicker than stock and meets SFI 29.1 certification. Ring gears are precision welded utilizing robotic cold-welding processes, ensuring a high quality, safe product.
  • Engineered for Performance: These flex plate adapters are designed for extreme duty applications and can withstand the punishment of high horsepower Gen III engines.
  • Kit Inclusions: The kit includes a Trans Adapter Flexplate, 6 Gen III LS Flexplate Bolts, an LS Crank Sleeve Adapter, and a Torque Converter Bolt Kit, providing all you need for an effortless Gen III LS swap.


Product Description

Speedway Motors
Speedway Motors Description
Speedway
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Mark S.
Reviewed in the United States on March 8, 2025
Terrible quality flexplate, welds are bad, gaps between plate and ring. I wouldn’t trust this thing if you care about what you’re putting it on
Eric aldridge
Reviewed in the United States on May 13, 2024
Good price worked great
Rich
Reviewed in the United States on December 25, 2024
Everything fits fine but the converter bolts supplied do not fit stock converter for 700r4 bolt holes. The arp bolts diameter too big maybe for aftermarket billet converter.
Gregg A Schulz
Reviewed in the United States on February 19, 2023
Great fit outstanding quality
James Horne
Reviewed in the United States on April 27, 2021
Fit perfect, LM7 to TH400
Jeffrey Jones
Reviewed in the United States on March 4, 2020
Fast shipping and quality product!
MIke
Reviewed in the United States on March 12, 2020
Worked great of swapping a 6.0L LS from a Silverado 2500 into a Humvee. Bolted up to our 6L to a 700R4
Patrick
Reviewed in the United States on April 23, 2020
This is the second time I've done a LS swap in an older GM vehicle. I've used this flexplate to mate up a LS to a TH350 in a 74 Chevy Impala. Now I'm in the process of LS swapping in a 84 Chevy K30 with a TH400 and ran into problems. The flexplate has holes for 10.75" and 11.063" converter bolt pattern. The converter that was in the TH400 has the larger 11.5" bolt pattern. So I either have to elongate the holes or buy a different flexplate with the correct 11.5" bolt pattern. I've since found out that p/n Z270 flexplate has everything needed as well as the larger 11.5" bolt pattern to work with the larger coverter bolt pattern but cannot confirm. Hope this helps.