GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines
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GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines

$671.00
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If you're looking for the highest quality flexplate on the market today check out this new 1 piece design from Boninfante.  Designed to work with GM Gen 3 & 4 LS engines with the 6 bolt crank flange.  This 168 tooth flexplate is  drilled for multiple converter patterns and it will allow you to mate up to the GM LS 4L65E(11.063" bolt circle), 4L80/85E, & 6L80/6L90E transmissions. Features: • One-piece design with integral ring gear• Specially selected aerospace grade alloy steel from USA steel mills• Proprietary 3-stage heat treating process• Hard machined to exacting tolerances (.002 TIR)• Boninfante’s proprietary stress proofing and finishing process• Finished in a beautiful black oxide• Tested to 20,000 RPM which exceeds SFI safety standard 29.2

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