Wehrli 2001-2005 LB7/LLY Duramax Upper Coolant Pipe
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
The rubber upper coolant hose is the last unfinished thing under the hood of a dressed-up 2001-2005 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LB7 and LLY. The Wehrli Upper Coolant Pipe (Manufacturer Part # WCF100860) replaces it with 14 gauge aluminum, powder coated in your choice of color, with silicone boots and stainless T-bolt clamps.
Why Choose the Wehrli Upper Coolant Pipe?
- Aluminum instead of a 20-year-old rubber hose – a rigid pipe with silicone boots giving flex only where it is needed.
- 14 gauge, not 16 – heavier wall than much of the aftermarket, so the T-bolt clamps can be pulled properly tight without kinking or denting the tube.
- Finishes the engine bay – matches Wehrli's coolant tanks, intake kits and intercooler piping in the same powder coat range.
- Stainless T-bolt clamps included – proper clamps, not worm gear.
- Honest about what it is – Wehrli says it plainly: no horsepower here, this is a cleanup part.
- Made in the USA.
Kit Includes
- 14 gauge aluminum upper coolant pipe
- Silicone boots
- Stainless steel T-bolt clamps
Fits These Models
2001, 2002, 2003, 2004, 2004.5 and 2005 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LB7 or LLY.
Specifications
- Construction: 14 ga. aluminum with silicone boots and stainless steel T-bolt clamps
- Replaces GM part numbers: 15792832, 15198345
- Shipping weight: 4.0 lbs
- Package dimensions: 12" W x 6" H x 12" L, ships in its own box
- Finish: custom powder coat, color selected above
- Made in the USA
Key Features at a Glance
- 14 ga. aluminum pipe - replaces the OEM rubber hose.
- Silicone boots and T-bolt clamps - included.
- Heavier wall than most - won't crush under the clamps.
- Custom powder coat finish - pick your color above.
Notes
- No WCFab badge on this one. Unlike Wehrli's other model year coolant pipes, this pipe does not come with the badge as standard — worth knowing if you are matching a set.
- Lead time varies by color. WCFab Red, Gloss Black and Gloss White are stocked and ship in 3-5 business days. All other colors are made to order on a 10-15 business day lead time.
- If you want the coolant routed up and forward off the thermostat for turbo clearance, that is the Top Outlet Billet Thermostat Housing kit instead — a different part.
FASS SKU: [ADD FASS SKU]
Manufacturer Part #: WCF100860
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax? Contact FASS Motorsports and we’ll get you dialed:
Phone: 636-429-7020
Email: info@fassmotorsports.com
This part fits the following vehicles:
| Years | Make & Model |
|---|---|
| 2001 | Chevrolet Silverado 2500 |
| 2001, 2005 | Chevrolet Silverado 3500 |
| 2001 | GMC Sierra 2500 |
| 2001, 2005 | GMC Sierra 3500 |
| 2005 | Chevrolet Silverado 2500 HD |
| 2005 | GMC Sierra 2500 HD |
Fitment is listed by year, make and model. Some applications also depend on cab, bed, drivetrain or engine — if you are not sure, call 636-429-7020 or send us your vehicle details and we will confirm before you order.
