{"product_id":"b-m-shift-improver-kit-gm-th400-475-transmissions","title":"B\u0026M Shift Improver Kit - GM TH400\/475 Transmissions","description":"The B\u0026amp;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 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.","brand":"B\u0026M","offers":[{"title":"Default Title","offer_id":42145665941589,"sku":"BBFT_20261","price":75.65,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0947\/5040\/files\/20261.jpg?v=1771125792","url":"https:\/\/speedzone-web.com\/products\/b-m-shift-improver-kit-gm-th400-475-transmissions","provider":"Speedzone Performance LLC","version":"1.0","type":"link"}