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LS1/LS2/LS6/5.3/6.0 to TH350/700R4/4L60 Adapter Flexplate - SFI 29.1 Certified - Direct Bolt-On - Compatible with Gen III LS Engines - Durable Construction

Free shipping on orders over $29.99

$87.99

$ 40 .99 $40.99

In Stock
  • Compatible with Various Transmissions: This adapter flexplate allows the use of GM TH350, 700R4, 200-4R, 4L60, and Powerglide transmissions with Gen III LS engines, providing versatility for your engine swap project.
  • Wide Torque Converter Compatibility: Works with 10.75" and 11.066" (11.1") torque converter bolt patterns, ensuring compatibility with a range of torque converters for seamless integration.
  • Cost-Saving Solution: Designed to work with the factory LS starter, this adapter flexplate helps reduce conversion costs by utilizing existing components.
  • Enhanced Durability: Featuring double welded ring gears, this flexplate is built to withstand the demands of high horsepower Gen III engines, providing added durability and reliability.
  • SFI 29.1 Certified and Thicker Design: With a thickness that is 0.035" thicker than stock, this flexplate meets SFI 29.1 certification, ensuring safety and performance. Constructed from cold-rolled premium steel, it offers long-lasting strength and resilience.



Product Description

Speedway
Speedway
Speedway

Rubidoux951
2025-08-27 14:01:38
First off Speedway Motors rocks! I bought the flex plate to mate my 04 LQ4 to a pre LS trans (LT) 4L60E and fit perfect and would definitely buy this again in the future.I had issues with shipping and speedway motors made things right and got my flex plate to me quick and made it to where I can my project done quickly. 10/5 stars
User1
2025-07-31 13:32:24
Works great to adapt a old style 4l60e to a 6.0ls. Have had it on for 5000 miles and it has had no issues with being beat on relentlessly. I would recommend it.
Ricardo
2025-06-28 10:33:33
Was hesitant that it might not bolt to my Powerglide setup ( still with 17 spline ) but worked great not cutting or anything like when using stock flywheel. Overall great but. And SFI approved!
Customer
2025-06-05 16:47:47
Used perfectly on my ls swapped 95 silverado us a 5.3 to the trucks factory 4l60e. Awesome product. Definitely using again on future projects
Customer
2025-04-17 11:40:15
Flex plate fit percent for ls swap to old style 4l60e. You still will need the spacer for 6.0 swaps
Kyle Kuntzsch
2025-03-23 15:49:16
Awesome product! Just what I needed for my LS swap on my 67c10 to keep my TH400 transmission!
Customer
2025-02-17 14:32:27
Great product. Fast delivery.
Crystal B.
2025-02-11 12:29:23
It fit good and the price was not bad either
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