Wehrli Custom Fabrication WCF100570-CT LB7 Duramax S400/Stock Compound Twin Turbo Kit Candy Teal

The Wehrli Custom Fabrication S400/Stock Compound Twin Turbo Kit for 2001-2004 LB7 Duramax engines delivers up to 1000 rear-wheel horsepower capability with supporting modifications. This compound turbo setup has become one of the most popular upgrades for daily drivers and towing rigs, proven to provide cooler EGTs and increased power across the RPM range while maintaining the factory turbine brake function. This kit comes in Wehrli's signature Candy Teal powder coat finish.

Key Features:

• 5-inch intake with dry air filter and Outerwears pre-filter cover
• 3.5-inch cold side charge pipe and turbo inlet horn
• 3-inch one-piece Y-bridge with HD bead roll end
• 3-inch cold side intercooler pipe
• Atmosphere turbo pedestal with built-in oil return fitting
• 4-inch turbo down pipe and 3-inch hot side crossover pipe
• Hand-built in-house with TIG welded tubing and CNC machined flanges with O-ring seals for boost-leak free installation

Performance Benefits:

• Recommended for daily driver work trucks and tow rigs seeking increased horsepower, better fuel mileage, and superior EGT control with stock-like turbo spool characteristics
• No additional turbo lag or loss of spool-up compared to factory turbo, with instant response and boost across a wider, more efficient range
• Capable of 650+ HP and 1300+ lb-ft of torque with proper tuning and supporting modifications

Wehrli Custom Fabrication stands behind their fabricated components and workmanship for the life you own the product. Note: This kit does not include the S400 turbocharger (sold separately). Professional installation and custom tuning are required. Not legal for use in California.