B&M 20260 Auto Transmission Upgrade kit Shift Improver GM TH400 TH375 M40 1965-1987 SHIFT IMPROVER KIT 65-87 TH4001965-1987 GM TH400, TH375 & TH475 Automatic Transmissions. 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.
Compatible with
Today?s Complex Fuels CCS Kits are supplied
with the highest quality components that meet or exceed original equipment
specifications and all CCS kits are compatible with today?s complex fuel All returns must be
pre-approved before returning. Absolutely No Refund on
installed items or returned items in non-sellable condition. Buyer to pay
returned shipping Cost. All
Electrical items Carburetor Kits and Fuel Injection Kits will be shipped in
sealed clear Package if the package is un-wrapped the item is
nonreturnable. Carburetor Collectible Specialty Thanks You for
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