2001-2004 LB7 Duramax S400/Stock Compound Turbo Kit.1000 RWHP capable depending upon turbo and fuel system modifications. Recommended for daily driver work trucks and tow rigs looking for increased horsepower, better fuel mileage, and superior EGT control with stock-like turbo spool characteristics. ??Recommended Combinations:??S475 / Stock IHI Turbo - Up to 750 RWHP with Supporting Modifications - Best Turbo Spool, performs well on stock fuel setups. WCFab 750 Built Allison transmission recommended.??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.WCFab 750+ Built Allison transmission recommended.??S480 / 64mm Drop In Turbo - 900+ RWHP Capable with Supporting Modifications - Improved top end power with moderate spool characteristics.WCFab 750+ Built Allison transmission recommended.??

This Part Fits:

Year	Make	Model	Submodel
2001-2004	Chevrolet	Silverado 2500 HD	Base
2001-2004	Chevrolet	Silverado 2500 HD	LS
2001-2004	Chevrolet	Silverado 2500 HD	LT
2004	Chevrolet	Silverado 2500 HD	WT
2001-2004	Chevrolet	Silverado 3500	Base
2001-2004	Chevrolet	Silverado 3500	LS
2001-2004	Chevrolet	Silverado 3500	LT
2004	Chevrolet	Silverado 3500	WT
2002-2004	GMC	Sierra 2500 HD	Base
2001-2002	GMC	Sierra 2500 HD	SL
2001-2004	GMC	Sierra 2500 HD	SLE
2001-2004	GMC	Sierra 2500 HD	SLT
2003-2004	GMC	Sierra 2500 HD	WT
2002-2004	GMC	Sierra 3500	Base
2001-2002	GMC	Sierra 3500	SL
2001-2004	GMC	Sierra 3500	SLE
2001-2004	GMC	Sierra 3500	SLT
2004	GMC	Sierra 3500	WT

HKS SYMMETRY TURBINE GT5565 BB 3BOLT A/R 0.73