1989-1998 Cummins 5.9L Replacement Heater Core Line Kit for 12-valve Cummins (FPE-CUMM-SSHCL-12V)
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.
- Upgraded stainless steel tubes and high temperature silicone hose replace leaking or corroded factory heater lines.
- Complete kit includes everything needed to replace heater lines from the block to the firewall.
- Direct replacement design for trucks originally equipped with air conditioning.
- Durable construction ensures long-lasting, leak-free performance.
- 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 ⅝” 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 in the kit.
- 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
- 1989 Dodge Ram D250/D350 5.9L 12V Cummins
- 1990 Dodge Ram D250/D350 5.9L 12V Cummins
- 1991 Dodge Ram D250/D350 5.9L 12V Cummins
- 1992 Dodge Ram D250/D350 5.9L 12V Cummins
- 1993 Dodge Ram D250/D350 5.9L 12V Cummins
- 1994 Dodge Ram 2500/3500 5.9L 12V Cummins
- 1995 Dodge Ram 2500/3500 5.9L 12V Cummins
- 1996 Dodge Ram 2500/3500 5.9L 12V Cummins
- 1997 Dodge Ram 2500/3500 5.9L 12V Cummins
- 1998 Dodge Ram 2500/3500 5.9L 12V Cummins
Please note that actual products may differ from images shown on our website. While we strive for accuracy in product listings, manufacturers may make changes to design, contents, color, or packaging without notice. Product images are for illustrative purposes only and may not represent the exact item you receive.
By purchasing, you acknowledge and accept that variations may occur and release OCDiesel from any liability related to product appearance differences.
Order Processing Time:
Orders are typically processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days depending on the product and customization required.
Shipping Methods:
Standard Shipping (3-7 business days - location dependent)
Express Shipping (1-2 business days- location dependent)
Packaging:
All parts are securely packaged to better prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
Shipping Rates:
Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
Order Tracking:
Once your order has been shipped, you will receive an email with the tracking number and carrier information. You can also track your order status by logging into your OCDiesel account.
USA Shipping:
We ship to the USA! (Except California) Please note that USA shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
Not all products are stocked in-house. To ensure you receive your desired items promptly, please check for availability before placing your order. Some products may be backordered due to high demand or supply chain constraints, which could result in longer delivery times.
We strive to keep our inventory updated regularly, but availability & pricing can change quickly without notice. For the most accurate information & pricing, contact the OCDiesel customer service team using either this link, or the chat bubble on the bottom right of this page.
Most items are eligible for return within 30 days of shipping, provided they are unused, in original manufacturer packaging, and in resalable condition.
All returns & cancellations are subject to restocking and cancellation fees.
On products with status "Contact for availability" please contact us before ordering to confirm availability. Orders placed without prior availability confirmation are subject to current lead times and our cancellation/restocking policy.
Returns must include a Return Authorization Number (RA #) and be shipped with tracking. Return shipping costs are the responsibility of the customer.
Custom/special orders, electronics, and digital goods are final sale—no returns, refunds, or exchanges.
For full return instructions, fee details, and conditions, click here.
Q&A
No questions answered yet. Have a question about this product? Ask our team below.
