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Fleece Performance Stainless Steel Heater Line Kits

Upgrade your leaking or corroded heater tubes with stainless steel tubes and a high-temperature silicone hose kit from Fleece Performance. This heater core kit contains everything needed to replace your heater lines from the block to the firewall. It's designed as a direct replacement for all 12-valve Cummins trucks originally equipped with air conditioning. Kit includes: * Stainless steel heater tube - replaces Cummins 3912086 * Stainless steel heater tube - replaces Cummins 3912087 * Silicone heater hose (straight tube to block) - replaces Cummins 3931522 * Silicone heater hose (90 degree tube to block) - replaces Cummins 3957649 * Silicone heater hoses (45 degree tubes to firewall) * Anodized billet aluminum hold-down clamps, billet aluminum standoff, and mounting hardware for both stock and aftermarket manifolds * Hose clamps Application notes: * This kit (S0486) is intended for use with trucks originally equipped with air conditioning. If your truck is not equipped with A/C, you'll need to supply your own 5/8 in. I.D. hose to run from the firewall ports to the stainless steel heater lines. * The silicone heater hose (tube to firewall) may require trimming for certain applications or to accommodate modifications made previously to the engine. * If 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 in the kit.

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