B&M 87-91 GM TH400 375 m40 42082R NHRA- and IHRA-approved blanket measures

NHRA- and IHRA-approved blanket measures 12" x 47" and meets SFI 4

place the correct size feeler gauge beneath the ground strap then tighten knob to set plug gap

all-terrain vehicles and many others requiring API service category TC

That's over 30% more flow

B&M 87-91 GM TH400 375 m40 42082R NHRA- and IHRA-approved blanket measuresShift Improver Kit for TH 400 (3L80) Automatic Transmission B&M'specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid. B&M Performance and Off Road has been at the vanguard of the growing automotive aftermarket since