Drivetrain› Automatic Transmissions and Components
B&M Racing (Holley)
TRANSKIT 65-87 TH400
SKU: B056 20229
Moderate — 2–4 hours
Description
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | B&M Racing (Holley) |
| Part Number | B056 20229 |
Videos
Install: B&M Shift Improver Kit 30262 for 1968-81 GM TH350 Automatic Transmissions
B&M shift improver Th400 overview
B&M Shift Improver Kit - Th350 Transmission Easy Installation
B&M Shift Point Change Kit For TH350, TH400, 700R4 or 4L60 Automatic Transmissions & Road Test
B&M shift kit install
After the shift Kit B&M installed
Transgo to B&M Shift Kit Swap TH400 Turbo Hydra-Matic 400
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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