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Summer Sale Fleece Replacement Heater Core Line 89-98 Dodge 5.9l 12v Cummins D250 D350 2500 3500 System [yRkp6W7m]

$54.99 $175.99 -69%

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. T

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Summer Sale Fleece Replacement Heater Core Line 89-98 Dodge 5.9l 12v Cummins D250 D350 2500 3500 System [yRkp6W7m]

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.

Features:

  • Upgraded stainless steel tubes
  • High temperature silicone hose kit from Fleece Performance
  • Direct replacement for all trucks originally equipped with air conditioning

Fitment:

  • 1989-1993 Dodge Ram D250/D350 5.9L 12V Cummins
  • 1994-1998 Dodge Ram 2500/3500 5.9L 12V Cummins

Included:

  • 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

Note:

  • Direct Replacement

What Our Customers Say

January 16, 2026

Absolutely no complaints!

This is very, very good for the money.

- Tony Z..

January 16, 2026

Absolutely no complaints!

This is a very nice and useful tool.

- Candace Y..

January 16, 2026

Absolutely no complaints!

This is a very nice and useful gadget.

- Rhoda T..

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