Wehrli Twin Turbo Kit S400 Stock for 2001-2004 Duramax LB7 Gun Metal Gun Metal 100570-GM

This is a 1000 RWHP capable twin-turbo kit for the 2001-2004 Chevrolet/GM 6.6L LB7 Duramax. It is recommended for daily driver work trucks and tow rigs that are looking for increased horsepower, better fuel mileage, and superior EGT control with stock-like turbo spool characteristics. This kit requires removal/relocation of the passenger side battery. Recommended combinations mentioned are: S475 / Stock IHI Turbo - Up to 750 RWHP with Supporting Modifications - Best Turbo Spool, performs well on stock fuel setups. S480 / Stock IHI Turbo - 800+ RWHP Capable with Supporting Modifications - Better top end performance that sacrifices a bit of spool on the low end compared to an S475/stock setup. S480 / Stealth 64 Drop In Turbo - 900+ RWHP Capable with Supporting Modifications - Improved top end power with moderate spool characteristics.