FLEECE FPE-CUMM-SSHCL-12V REPLACEMENT HEATER CORE LINE KIT FOR 89-98 12 VALVE CUMMINS

Replace 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.

This kit is designed as a direct replacement for all 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 deg tube to block) - replaces Cummins 3957649
• Silicone heater hoses (45 deg 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 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. 
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.

FLEECE FPE-CUMM-SSHCL-12V Replacement Heater Core Line Kit for 89-98 12 Valve Cummins offers a robust solution for addressing leaking or corroded heater tubes in your truck. Engineered by Fleece Performance, this kit promises durability and performance, thanks to its stainless steel tubes and high-temperature silicone hoses. It's designed specifically for vehicles equipped with air conditioning, ensuring a seamless fit and effective replacement.

Included in the kit are two stainless steel heater tubes that substitute Cummins part numbers 3912086 and 3912087, providing a reliable, long-lasting solution. Silicone heater hoses are part of this comprehensive set, featuring a straight tube to the block, a 90-degree tube to the block, and additional hoses crafted for 45-degree connections to the firewall. This all-in-one package is tailored to help restore your vehicle's heating system efficiently.

Each component is complemented by anodized billet aluminum hold-down clamps, a billet aluminum standoff, and mounting hardware, suitable for both stock and aftermarket manifolds. Hose clamps are also included, guaranteeing easy and secure installation.

For optimal performance, it’s important to note that if your truck lacks air conditioning, you will need to provide your own 5/8 inch ID hose to connect the firewall ports to the stainless steel heater lines. In some instances, trimming of the silicone heater hose may be required to accommodate modifications or ensure proper fitting.

This kit not only enhances the reliability of your truck’s heating system but also adds a touch of stainless steel sophistication. Upgrade your 89-98 Cummins with FLEECE's premium replacement heater core line kit and experience improved functionality on every journey.