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.

Improve the sound and performance of your ride with Hooker, Flowtech or Flowmaster mufflers! Choose from various styles including; turbo, chambered or glass pack styles in multiple configurations.