B&M Flexplate, Steel SFI, 1970-1990 For Chevrolet 454 Big Block with 168-tooth, externally balanced engines. (BM20233)

BM20233 - BB CHEV 454 168T EXT BAL

Suit BB Chev 454 168 Tooth, Externally Balanced

Part Number: BM20233

BB Chevrolet 454 externally balanced 168 tooth ring gear 10-3/4" or 11-1/2" bolt circle.
Chevrolet flexplates have dual bolt patterns to accommodate Powerglide, TH-350, 400 & 700-R4.
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!