Wehrli 2004.5-2005 LLY Duramax 3" Passenger (Cold) Side Intercooler Pipe Kit

Kill the boost leaks on your 2004.5-2005 Chevrolet Silverado / GMC Sierra 2500HD/3500HD 6.6L Duramax LLY with the Wehrli 3" Passenger (Cold) Side Intercooler Pipe Kit (Manufacturer Part # WCF100355). This one-piece, mandrel bent 14 gauge aluminum pipe replaces the 2.5" factory aluminum tube and the OEM clip ring that fails under boost. Bolts to a stock truck, no tuning and no other modifications required.

Why Choose the Wehrli 3" Passenger (Cold) Side Intercooler Pipe Kit?

• 3" replaces 2.5" – Wehrli measures this pipe flowing 56% better than the factory piece, with mandrel bends instead of the stock restrictions.
• One piece, not two – fewer joints between the intercooler and the Y-bridge means fewer places for pressure to escape.
• Clip ring deleted – the OEM clip ring design is replaced by a high quality silicone boot and stainless steel T-bolt clamps that actually hold boost.
• Straight boot connection at the intercooler – unlike the angled factory connection, which is a known leak point on the LLY.
• Keeps your OEM Y-bridge – compatible with the factory Y-bridge / cross over pipe, so this is a standalone upgrade, not the start of a chain.
• Better spool and throttle response – improved airflow between the turbo and the engine, and a weak point removed before it fails in a hard working truck.
• Custom powder coat – finished in your choice of Wehrli's colors, made in the USA.

Kit Includes

• 3" passenger (cold) side intercooler pipe, 14 gauge aluminum, one piece
• Silicone boots
• Stainless steel T-bolt clamps

Installation Highlights

Installs easily with basic hand tools. Fits a stock truck with no additional modifications, upgrades or tuning needed, and retains the factory Y-bridge / cross over pipe connection.

Fits These Models

2004, 2004.5 and 2005 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LLY.

Specifications

• Pipe diameter: 3" (replaces 2.5" factory pipe)
• Construction: 14 ga. mandrel bent aluminum, one piece
• Flow: 56% better than stock, per Wehrli
• Replaces GM part numbers: 15188720, 15188721, 15198168
• Shipping weight: 6.0 lbs
• Package dimensions: 32" W x 12" 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

• 3" one-piece pipe - upsizes the factory 2.5" restriction.
• Silicone boot and T-bolt clamps - replaces the leak-prone OEM clip ring.
• Straight intercooler connection - fixes the angled factory boot joint.
• OEM Y-bridge compatible - no other parts required.
• No tuning required - bolt on to a stock truck.
• Custom powder coat finish - pick your color above.

Notes

• ⚠ NOT COMPATIBLE WITH BANKS INTERCOOLERS. If you are running a Banks intercooler, this pipe will not fit.
• Lead time varies by color. WCFab Red, Candy Teal, 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.
• Pairs best with emissions compliant tuning and a drop-in turbocharger if you are chasing bigger gains.

FASS SKU: WCFWCF100355

Manufacturer Part #: WCF100355

Questions? We’re Here to Help.

Have questions about upgrades for your 6.6L Duramax LLY? Contact FASS Motorsports and we’ll get you dialed:

Phone: 636-429-7020

Email: info@fassmotorsports.com