The GMT800 HD trucks were a massive step forward for GM's truck division. The available engines included the LS-based 6.0L, the big block 8.1L, and the line-topping 6.6L LB7, LLY, or LBZ Duramax diesel. Whether gas or diesel, we have the parts to take your truck to the next level on the street, worksite, or drag strip.

Hays offers everything from complete high-performance clutch kits to discs, pressure plates, and flywheels for many applications. Whatever the driveline need, Hays has you covered.