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BTR FLEXPLATE ADAPTER KIT - LS TO TH400/TH350/700R/PG - BTR21399
If you're bolting a TH350/400, Powerglide, or 700R4 behind your LS motor, BTR's flexplate adapter kit makes installation a breeze.
This kit includes:
(1) 12563532
(1) 19260102
(6) BTR57940
Designed for torque converters that have a standard length pilot and an 11.5" bolt circle ONLY.