{"product_id":"b-m-shift-improver-kit-81-90-th-200-4r-35265","title":"B\u0026M Shift Improver Kit 81-90 Th-200-4R - 35265","description":"\u003cp\u003eB\u0026amp;M Shift Improver Kit for 1981-1990 Chevrolet, Buick, Olds, Pontiac and GMC TH-200-4R transmissions. It recalibrates the transmission for improved performance and extended life, eliminates shift overlap and excess clutch\/band wear, and offers Heavy Duty and Street\/Strip modes.\u003c\/p\u003e","brand":"B\u0026M","offers":[{"title":"Default Title","offer_id":49544684339438,"sku":"BMM-35265","price":88.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/Screenshot2026-09-07223016.png?v=1788838227","url":"https:\/\/elmosspeedshop.com\/products\/b-m-shift-improver-kit-81-90-th-200-4r-35265","provider":"Elmo's Speed Shop","version":"1.0","type":"link"}