Wehrli Model WCF100504

The Stage 3 upgrade for the 2007.5-2010 LMM 6.6L Duramax equipped Chevrolet Silverado and GMC Sierra 2500 / 3500 HD truck combines our popular Stage 2 High Flow Bundle and 3" Stainless Steel Down Pipe into a single package providing increased air and exhaust flow for your turbo and engine for improved efficiency, throttle response, and turbo spool up. Eliminates weak points in the factory design that can contribute to lost power, boost leaks, and complete failures in hard working and high performance applications.

On the air intake side, our high flow fabricated intake pipe, intake horn, and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on 2007.5-2010 LMM Duramax Diesel for improved engine performance and sound. Significantly increases airflow to your turbo producing improved horsepower and torque and cooler intake temperatures by drawing cold air through the inner fender. All aluminum 14 ga. construction features large diameter 4 in. piping with smooth aerodynamic bends. Improves intake air velocity, volume, and provides a more aggressive engine and turbo sound during acceleration. Air box is constructed of 10G aluminum sheet. Our 4.8 in. turbo intake horn is the largest on the market providing a 20% air flow improvement over stock. High quality hardware, silicone boot, seals, and stainless steel t-bolt clamps ensure optimum durability and ease of installation. Removable air box lid element allows for easy visual inspection and maintenance of your WCFab filter with included hydrophobic pre-filter cover, to help keep your MAF sensor, turbo, and engine airways contaminant free.

After the turbo, our Stage 3 kit also upgrades the restricted 2.5 in. diameter driver (hot) side intercooler pipe and leak-prone plastic / rubber passenger (cold) side pipe with WCFab's heavy duty 3 in. diameter 1-piece Driver (Hot) Side and 3.5 in. diameter Passenger (Cold) Side LMM Intercooler Pipes. Made in the USA from high strength, heavy duty 14 ga. aluminum tube with smooth, aerodynamic mandrel bends for increased durability and optimized flow. 3 in. Driver Side pipe includes high quality reinforced silicone boots and stainless t-bolt clamps for superior temperature resistance and boost pressure holding capabilities. 3.5" Passenger Side pipe improves air flow over stock part by 47%! Features CNC machined flanges with a double o-ring seals and an upgraded silicone hump boot in order to withstand higher boost pressures than the factory components to increase reliability and eliminate blown factory boots and horsepower robbing boost leaks.

The key component of this bundle is our signature high flow 3" Y-Bridge Kit which replaces the OEM upper intake manifold supplying air to the engine intake runners. The OEM Y-bridge for these trucks is a poorly designed, slip-fit style two-piece bridge with very little support and is prone to blowing apart under boost on hard working and high performance trucks creating poor drivability and decreased power. This kit is a much improved, high flow, bolt together style two-piece 3" bridge which provides a secure sealing surface where the air inlet horn connects to the bridge. 3" high flow upper and lower intercooler pipes feature smooth flowing mandrel bends, CNC machined billet flanges and perfectly compliment the y-bridge to offer a full 3" tract from intercooler pipe slip connection to the engine incorporating the factory grid heater and EGR connection controls for the ultimate in emissions compliant performance. Stage 3 High Flow Bundle Kit is finished with our 3" Stainless Steel Down Pipe which improves exhaust flow after the turbocharger by increasing the flow area of this section of your engine's exhaust and removing unnecessary restrictions in the OEM design.

Full assembly finished in your choice of WCFab's signature custom powder coat colors for a look as unique as your truck. Compatible with stock trucks, no tuning required.

Saves up to $281 vs. purchasing included parts individually.

Pairs best with Emissions Compliant Performance Tuning and Upgraded Drop In Style Turbochargers.

4 in. Aluminum intake pipe with Air box enclosure, dry filter assembly and Outerwears pre-filter cover, 4.8 in. Intake horn with PCV port
- 3 in. Hot Side Intercooler Pipe & 3.5 in. Cold Side Intercooler Pipe
- WCFab's Signature 3" Two Piece Y-Bridge, with Upper Crossover and Lower Intercooler Pipes (Flows 36% Better Than Stock!)
- CNC Machined Flanges with Double O-Ring Seals provide an improved sealing surface to eliminate boost leaks.
- Silicone Boots, Stainless Steel T-Bolt Clamps, O-Rings, Intercooler Outlet Clip, Installation Hardware
- Retains factory connection points and sensors
- 3" Stainless Steel Turbo Down Pipe with Heat Wrap
- NO Tuning required, bolt on!
- Will fit on stock truck no other modifications or upgrades necessary!
- Custom Powder Coat Finish
- Made In the USA

***NOTE: CSF Aftermarket intercoolers require modification / grinding of intercooler outlet lip for installation.***

CSF 06-10 GMC Sierra 2500HD 6.6L OEM Intercooler

Powerhouse Diesel