About this product
The factory cold side pipe on a 2020-2026 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax L5P is a restricted rubber and plastic design, and it is where boost leaks start. The Wehrli 3.5" High Flow Passenger (Cold) Side Intercooler Pipe Kit (Manufacturer Part # WCF100381) replaces it with a one-piece 14 gauge aluminum pipe sealed at both ends with double O-rings.
Why Choose the Wehrli Cold Side Intercooler Pipe Kit?
- One piece aluminum – replaces the OEM rubber and plastic assembly with a full 3.5" mandrel bent pipe.
- Double O-ring seal at both ends – a black anodized CNC machined billet adapter at the upper connection and a CNC machined flange at the intercooler, each with double O-rings.
- Upgraded silicone boot and stainless T-bolt clamps – better pressure and temperature resistance than the factory design.
- Fewer blown boots, fewer boost leaks – which is the point on a tuned or worked truck.
- 14 gauge aluminum – heavy wall construction, made in the USA.
- No tuning required – bolt on to a stock truck.
Kit Includes
- 3.5" passenger (cold) side intercooler pipe, one piece, 14 gauge aluminum
- Black anodized CNC machined billet aluminum adapter with double O-ring seal
- CNC machined flange with double O-ring seal at the intercooler connection
- Upgraded silicone boot
- Stainless steel T-bolt clamps
Fits These Models
2020, 2021, 2022, 2023, 2024, 2025 and 2026 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax L5P.
Specifications
- Pipe: 3.5" diameter, one piece, 14 ga. aluminum
- Upper connection: black anodized CNC machined billet adapter, double O-ring
- Intercooler connection: CNC machined flange, double O-ring
- Shipping weight: 8.0 lbs
- Package dimensions: 24" W x 6" H x 10" L
- Finish: custom powder coat, color selected above
- Made in the USA
Key Features at a Glance
- One-piece 3.5" aluminum - replaces OEM rubber and plastic.
- Double O-ring seals at both ends - billet adapter and machined flange.
- Upgraded boot and T-bolt clamps - holds real boost.
- 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 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 3" driver (hot) side pipe is a separate part. Wehrli's Stage 1 bundle covers both sides in one kit.
FASS SKU: WCFWCF100381
Manufacturer Part #: WCF100381
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax L5P? Contact FASS Motorsports and we’ll get you dialed:
Phone: 636-429-7020
Email: info@fassmotorsports.com
Description supplied by FASS Motorsports through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.
