{"product_id":"b-m-shift-improver-kit-gm-th400-transmissions-20260","title":"B\u0026M Shift Improver Kit - GM TH400 Transmissions 20260","description":"\u003cdiv class=\"full_description\"\u003eThe B\u0026amp;M¨ Shift Improver kitsª 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.\u003c\/div\u003e\u003ch3\u003eFeatures:\u003c\/h3\u003e\u003cul class=\"productpage_list\"\u003e\n\u003cli\u003ePerfect for Towing or Street\/Strip Use\u003c\/li\u003e\n\u003cli\u003eEliminates Soft and Sluggish Shift\u003c\/li\u003e\n\u003cli\u003eRecalibrates Stock Transmissions\u003c\/li\u003e\n\u003cli\u003eOver 65 Years of B\u0026amp;M Quality\u003c\/li\u003e\n\u003cli\u003eEliminates Shift Overlap\u003c\/li\u003e\n\u003cli\u003eProvides Crisp Shifts\u003c\/li\u003e\n\u003c\/ul\u003e\n\t\t\u003cdiv class=\"brandbox\"\u003e\n\t\t\t\u003cdiv class=\"brand-content\"\u003e\n\t\t\t\t\u003cp class=\"brand-title\"\u003eAbout B\u0026amp;M\u003c\/p\u003e\n\t\t\t\t\u003cdiv class=\"brand-main\"\u003e\n\t\t\t\t\t\u003cdiv class=\"brand-image-container\"\u003e\u003cimg class=\"brand-image\" width=\"387\" src=\"\/\/images.holley.com\/387x\/websitebrandimages_bandm_revise.jpg\"\u003e\u003c\/div\u003e\n\t\t\t\t\t\u003cp class=\"brand-text\"\u003eShop B\u0026amp;M's official site for automatic shifters, transmissions and components that exceed all your performance enthusiast needs at Holley.com!\u003c\/p\u003e\n\t\t\t\t\u003c\/div\u003e\n\t\t\t\u003c\/div\u003e\n\t\t\u003c\/div\u003e","brand":"B\u0026M","offers":[{"title":"Default Title","offer_id":62412574261619,"sku":"20260","price":74.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/6289\/0099\/files\/7775f4c88527110d679ffe714a95c4403d7aacd5.jpg?v=1767319645","url":"https:\/\/dspperformancemotorsports.com\/products\/b-m-shift-improver-kit-gm-th400-transmissions-20260","provider":"DSP PERFORMANCE MOTORSPORTS","version":"1.0","type":"link"}