2006-2010 Duramax LBZ/LMM TransGo Jr. Valve Body Repair Kit (SK-ALLISON-JR) 1994 GM Engine Components 7L 4" Turbo Back Exhaust

7L 4" Turbo Back Exhaust (421039 / 421040)

020 Piston With Rings (

This design ensures a perfect fit

and removes larger fuel particulates

D-701-20 116120916 116120710 2007

2006-2010 Duramax LBZ/LMM TransGo Jr. Valve Body Repair Kit (SK-ALLISON-JR) 1994 GM Engine Components 7L 4" Turbo Back ExhaustThe included valve body components in this kit are designed to provide substantial gains in friction plate durability. With this kit installed, the friction torque capacity of the holding clutches and brakes in 2nd through 6th gear is increased by approximately 100% when the lock up clutch is off and line pressure is at maximum. Since transmission removal is not required, install it before adding engine horsepower to prevent internal damage.