{"product_id":"fleece-performance-replacement-heater-core-line-kit-for-89-98-12-valve-cummins-fleece-performance","title":"Fleece Performance Replacement Heater Core Line Kit For 89-98 12 Valve Cummins Fleece Performance","description":"\u003cp\u003eReplace your leaking or corroded heater tubes with our upgraded stainless steel tubes and high temperature silicone hose kit from Fleece Performance. This kit contains everything you need to replace your heater lines from the block to the firewall.\u003c\/p\u003e\u003cp\u003eThis kit is designed as a direct replacement for all trucks originally equipped with air conditioning.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKit includes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStainless steel heater tube - replaces Cummins 3912086\u003c\/li\u003e\n\u003cli\u003eStainless steel heater tube - replaces Cummins 3912087\u003c\/li\u003e\n\u003cli\u003eSilicone heater hose (straight tube to block) - replaces Cummins 3931522\u003c\/li\u003e\n\u003cli\u003eSilicone heater hose (90 deg tube to block) - replaces Cummins 3957649\u003c\/li\u003e\n\u003cli\u003eSilicone heater hoses (45 deg tubes to firewall)\u003c\/li\u003e\n\u003cli\u003eAnodized billet aluminum hold down clamps, billet aluminum standoff, and mounting hardware for both stock and aftermarket manifolds\u003c\/li\u003e\n\u003cli\u003eHose clamps\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplication Notes:\u003c\/strong\u003e\u003cbr\u003eThis kit is intended for use with trucks originally equipped with air-conditioning. If your truck is not equipped with air conditioning, you will need to supply your own 5\/8 inch ID hose to run from the firewall ports to the stainless steel heater lines. \u003cbr\u003eThe silicone heater hose (tube to firewall) may require trimming for certain applications or to accommodate modifications made previously to the engine. \u003cbr\u003eIf your truck is equipped with an aftermarket exhaust manifold, the rear heater line standoff will not be utilized and an additional mounting bracket is provided.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003eShop high-quality truck parts, auto parts, and performance accessories engineered for strength, reliability, and a precise fit. Each component we carry is carefully vetted for durability, safety, and real-world performance—meeting or exceeding OEM standards. Whether you’re replacing worn parts, upgrading suspension systems, or adding off-road equipment, Truck \u0026amp; Auto Parts Store provides trusted OEM and aftermarket brands designed to handle the demands of trucks, SUVs, and 4x4s. With expert support, fast U.S. shipping, and a commitment to customer satisfaction, you can order with confidence knowing every product delivers dependable performance on the road and off.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":51249443832024,"sku":"FQWW_FPE-CUMM-SSHCL-12V","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0684\/3180\/6680\/files\/FPE-CUMM-SSHCL-12V-FQWW.png?v=1767424967","url":"https:\/\/www.truckandautopartsstore.com\/products\/fleece-performance-replacement-heater-core-line-kit-for-89-98-12-valve-cummins-fleece-performance","provider":"Truck \u0026 Auto Parts Store","version":"1.0","type":"link"}