{"product_id":"piston-and-ring-kit-for-cummins-3-9l-8v-4bt","title":"Piston and Ring Kit for Cummins 3.9L 8V 4BT","description":"The Speed of Air Piston Kit, model XA10097, is engineered for Cummins 3.9L 8V 4BT engines produced between 1994 and 1998. This kit utilizes Speed of Air's patented technology, including a thermal barrier coated crown and an M42 skirt coating, to improve engine efficiency. It also features a Total Seal 2nd ring for enhanced sealing.\n\nThis kit contributes to increased torque, horsepower, reduced emissions, and improved fuel efficiency, with independent commercial users documenting fuel savings of up to 25 percent. The enhancements also extend engine life and reduce service intervals.\n\nKey specifications include a bore of 4.015 inches (102mm), a stroke of 4.724 inches (120mm), a compression height of 2.818 inches (71.6mm), and a crown volume of +44.2cc, resulting in a compression ratio of 17.5:1. The kit comes with floating pins measuring 1.575 inches (40mm) in diameter and a ring pack specification of 3.0K, 2.35mm, 4.0mm. Oversizes available include STD, 0.50mm, 0.75mm, and 1.0mm.","brand":"Speed of Air","offers":[{"title":"Default Title","offer_id":52664225595704,"sku":"XA10097","price":1689.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687547552.jpg?v=1784335481","url":"https:\/\/store.motormia.co\/products\/piston-and-ring-kit-for-cummins-3-9l-8v-4bt","provider":"MOTORMIA","version":"1.0","type":"link"}