B and M AUTOMOTIVE
Th400 Shift Improver Kit
SKU: BMM20260
$88.99
Secure checkout with Cunningham Customs LLC. Real people handle your order. Create an account to save garage and addresses for next time.
Automatic Transmission Shift Kit - Shift Improver - TH400 / TH375 / M40 1965-87 - Kit
What this part is for
B and M AUTOMOTIVE Th400 Shift Improver Kit is a performance part builders add when the stock piece won’t do the job — whether that’s durability, flow, adjustability, or packaging in a custom build. Automatic Transmission Shift Kit - Shift Improver - TH400 / TH375 / M40 1965-87 - Kit Ask Grok with your year, make, model, and engine, or Call Us — confirm fitment once before you buy. Real people at Cunningham Customs handle the order.
Shop all parts · Search the catalog · Build guides · Camshaft help · More B and M AUTOMOTIVE
Comments & builder notes
Share fitment tips, install notes, or questions. Customers, the shop, and Grok can all chime in. New comments notify the Cunningham Customs team for review.