The T1XX platform made its way to GM's HD series trucks for the 2020 model year. With it came major upgrades inside, outside, and most importantly, under the hood. The base engine became a 6.6L LT-based V8 producing 401 horsepower. The 6.6L L5P Duramax is the line-topping diesel and provides 910 lb/ft of torque in stock form. No matter how you put your HD truck to use, we have the parts to make it perform better.

Going fast is always our goal, but having the support and power to stop your hod-rod is a must! At Holley.com we have you covered for Rotors, Pads, Master Cylinders, Big Brake Kits and all supporting accessories to improve how your car responds.