B&M Shift Improver Kit - GM TH400/475 Transmissions - 20261 interior-switches-and-controls 1-5/8 inch Product Type Headers

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B&M Shift Improver Kit - GM TH400/475 Transmissions - 20261 interior-switches-and-controls 1-5/8 inch Product Type HeadersOverview: The B&M Shift Improver kits feature two options to recalibrating your 1988 1994 GM TH400 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