SB Chevrolet 400 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.
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