The B&M® Shift Improver kits™ feature two options to recalibrating your 1965-1987 GM TH400, TH375 and TH475 automatic transmissions. First is the HEAVY DUTY set-up, giving you firm positive shifts without loss of driver comfort for improved performance in all street vehicles. This is a great option for performance street driving or towing. The second is our STREET/STRIP set-up. Be warned, this will deliver firm positive shifts you will feel, along with easily chirping the tires when shifting somewhat aggressively. This setting is recommend for high performance street/strip use, or for competitive events when you want the hardest, quickest shifts possible from a shift improver kit.
| Retailer | Base | Shipping | Tax | Availability | Total Price | ||
|---|---|---|---|---|---|---|---|
$77.15 | --- | --- | In Stock | $77.15 |
* RideBuilder may earn a commission when you purchase products from participating retailers linked on this page, at no additional cost to you. Affiliate compensation does not affect which products are displayed, the prices shown, or the order in which retailer offers are listed. Learn more here.
