Description
Description
Fits
| Year | Make | Model / Engine |
|---|---|---|
| 2020-2026 | Chevrolet / GMC | Silverado / Sierra 2500HD & 3500HD 6.6L L5P |
The WCFab Stage 2 High Flow Bundle is the ultimate air-management overhaul for your 2020-2026 L5P Duramax. This comprehensive kit combines a full 4-inch cold air intake system with heavy-duty hot and cold side intercooler pipes, eliminating every restrictive plastic component and leak-prone rubber boot between your air filter and the engine. By upgrading to smooth, mandrel-bent 14-gauge aluminum, you’ll see immediate improvements in turbo spool-up, throttle response, and overall engine efficiency.
On the intake side, the oversized 4-inch horn and airbox enclosure draw cool air directly from the factory hood ram-air duct and inner fender. After the turbo, the kit replaces the narrow 2.5-inch factory piping with a massive 3-inch driver-side (hot) pipe and a 3.5-inch passenger-side (cold) pipe. Featuring CNC-machined flanges and double O-ring seals, this bundle is engineered to hold higher boost pressures than factory components, making it a “must-have” for both stock trucks and high-performance applications.
Part Number: WCF100414
Features
- Complete Airflow Solution: Combines Stage 1 and Stage 2 kits to optimize both the intake and charge-air cooling paths.
- Massive 4″ Intake: Replaces restrictive factory plastic with 4″ aluminum piping and an oversized intake horn for maximum velocity.
- Heavy-Duty Intercooler Pipes: Includes a 3″ Hot Side and 3.5″ Cold Side pipe to eliminate boost leaks and blown factory boots.
- Superior Sealing: CNC-machined flanges with double O-rings and stainless T-bolt clamps ensure a leak-free fit under high boost.
- Direct Bolt-On: No tuning required! Retains all factory sensors and connection points for a seamless install.
- Custom Look: Finished in a durable powder coat to dress up your engine bay while protecting against corrosion.
- Made in the USA: Fabricated from high-strength 14-gauge aluminum for ultimate durability.
Includes
- 4 in. Aluminum Intake Pipe
- 4 in. Intake Horn with PCV Port and Surge Ring
- Air box enclosure with dry filter assembly and Outerwears pre-filter cover
- Installation hardware, 4 in. silicone hump boot and stainless t-bolt clamps
- 3 in. Hot Side Intercooler Pipe
- 3.5 in. Cold Side Intercooler Pipe
- CNC-machined flange and black anodized billet aluminum adapter with Double O-Rings
- Silicone Boots, Stainless Steel T-Bolt Clamps, and O-Rings
- Intercooler Outlet Clip
Notes
- Installation: Installs with basic hand tools; no modifications to the truck are necessary.
- Savings: This bundle saves you over $60 compared to purchasing the intake and pipe kits individually.
- Emissions: This product cannot ship to the state of California.
- Color: Custom powder coat colors are available—please allow for additional lead time for coating.
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