Wehrli 2011-2016 LML Duramax 3.5" Passenger (Cold) Side Intercooler Pipe Kit
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 factory cold side pipe on a 2011-2016 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LML is a two-piece plastic assembly, and it is where boost leaks start. The Wehrli 3.5" High Flow Passenger (Cold) Side Intercooler Pipe Kit (Manufacturer Part # WCF100682) replaces it with a one-piece 14 gauge aluminum pipe — 23% more airflow than stock.
Why Choose the Wehrli Cold Side Intercooler Pipe Kit?
- 23% more airflow than stock – Wehrli's measured figure, from going one-piece and upsizing to 3.5".
- One piece instead of two – the factory joint in the middle of a plastic pipe is a failure waiting to happen. This deletes it.
- Clip ring gone – the OEM clip ring design is replaced with a high quality silicone boot and stainless steel T-bolt clamps that seal properly and hold higher boost.
- Threaded bung for your IAT sensor – the factory intake temperature sensor reinstalls into the new pipe. Nothing to relocate or delete.
- Works with the OEM Y-bridge and crossover – nothing else needs replacing.
- 14 gauge aluminum – heavy wall construction, made in the USA.
- No tuning required – fits a stock truck, installs with basic hand tools.
Kit Includes
- 3.5" cold side intercooler pipe, one piece, 14 gauge aluminum
- Upgraded silicone boots
- Stainless steel T-bolt clamps
- Threaded bung for OEM intake temperature sensor
Fits These Models
2011, 2012, 2013, 2014, 2015 and 2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LML.
Specifications
- Pipe: 3.5" diameter, one piece, 14 ga. aluminum
- Airflow: 23% gain over stock, per Wehrli
- Compatible with the OEM Y-bridge and crossover pipe
- Shipping weight: 8.0 lbs
- Package dimensions: 12" W x 12" H x 32" L, ships in its own box
- Finish: custom powder coat, color selected above
- Made in the USA
Key Features at a Glance
- 23% more airflow than stock - measured by Wehrli.
- One-piece aluminum - replaces the two-piece plastic OEM pipe.
- Clip ring deleted - silicone boot and T-bolt clamps instead.
- IAT sensor bung built in - factory sensor reinstalls.
- No tuning required - bolt on to a stock truck.
- Custom powder coat finish - pick your color above.
Notes
- Lead time varies by color. WCFab Red, WCFab Grey, Gloss White and Gloss Black are stocked and ship in 3-5 business days. All other colors are made to order on a 10-15 business day lead time.
- The matching driver (hot) side 3" pipe is a separate part — call if you want both.
FASS SKU: [ADD FASS SKU]
Manufacturer Part #: WCF100682
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax LML? 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 |
|---|---|
| 2011, 2016 | Chevrolet Silverado 2500 HD |
| 2011, 2016 | Chevrolet Silverado 3500 HD |
| 2011, 2016 | GMC Sierra 2500 HD |
| 2011, 2016 | GMC Sierra 3500 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.
