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Flexplates, ATI SFI Flexplates, 139-Tooth, Internal Black, Steel, SFI 29.1, Chevrolet, Sold as a Kit
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Estimated Ship Date from Ohio: Monday 10/19/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
915578
Part Type:
Product Line:
Summit Racing Part Number:
ATI-915578
Ring Gear Tooth Quantity:
139-tooth
Rear Main Seal Style:
1-piece
Engine Balance:
Internal
Flexplate Material:
Steel
SFI Rating:
SFI 29.1
Marine Use:
No
Quantity:
Sold as a kit.
Notes:
For racing applications only. Flexplate requires an aftermarket 10DP starter and only works with aftermarket-style converters. No LS length pilot or adapter is needed for the converter.
ATI SFI Flexplates
Made on state-of-the-art CNC equipment, ATI SFI flexplates are double MIG/TIG-welded with certified American-made materials that far exceed SFI specs for safety. They're manufactured and toleranced from actual OEM drawings to ensure precise fit and location. Each is quality-inspected to exceed the flatness and runout tolerances of the OEM units. They are also precision-balanced on Hines digital equipment with a resolution of 1/10 oz. per inch. Available in dozens of configurations, ATI SFI flexplates can be ordered for fitment on vehicles covering every decade since the mid-1950s.
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Some parts are not legal for use in California or other states with similar laws / regulations
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