B&M Flexplate, Steel SFI, 1955-1985 For Chevrolet Small Block except the 400 cid engine, 153 tooth (BM20237)

BM20237 - SB CHEV 350 153T FLEXPLATE

Suit SB Chev 153 Tooth, Internally Balanced

Part Number: BM20237

SB Chevrolet except 400, internally balanced 153 tooth ring gear 10-3/4" bolt circle.
SFI 29.1 approved, NHRA/IHRA legal for all classes.
SFI certification sticker included (recertification required every 3 yrs.).

Ideal for street applications to extreme duty racing and high (above 6,000) rpm use.
B&M's new Radial Tension Technology puts a new spin on flexplate technology. As engine performance levels increase, stronger flexplates become necessary. Until this point, stronger flexplates meant thicker flexplates. This works, but it adds unwanted weight and prohibited the flexplates from working as it was designed. Flexplates are designed to provide a protection against converter/transmission run-out or OEM misalignment, which will cause transmission and/or converter failure. A rigid flexplate gives no protection. The ultimate design for a flexplate is extreme strength, flexibility and minimal weight. B&M's new RTT performance flexplate accomplishes this goal. B&M's design allows for the removal of unnecessary material from non-critical stress areas. Less material means less weight - giving you the benefits of a lightweight, flexible design with thicker material for maximum strength!