B&M Shift Improver Kit - GM TH400 Transmissions - 20260 mounts-and-panels Brand Holley EFI Construction Cast

Brand Holley EFI Construction Cast Emission Code 4 Finish Black Product Type Manifold Type of Component Manifold Top Warranty Limited 90 Day

3L V8 1980 - 1981 Pontiac Catalina 265/4

Year Make Model Submodel Engine Size 2005 Ford Thunderbird 3

5 V8 1997 - 2002 GMC Savana 2500 395/6

B&M Shift Improver Kit - GM TH400 Transmissions - 20260 mounts-and-panels Brand Holley EFI Construction CastOverview: 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,