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

Regular price $671.00 Save $-671.00
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GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines

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.


• 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

Prop 65 Warning Label

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