XDP Main Stud Kit 2001-2005 GM 6.6L Duramax LB7/LLY Wire Harness Splitter It’s a true bolt-on upgrade

It’s a true bolt-on upgrade that delivers more airflow

We have partnered with a very reputable tuning company for the lowest/minimal smoke with modified injectors while maintaining optimal power output

dialing in a weekend racer

XDP’s X-TRA Cool Transmission Oil Coolers are made using techniques borrowed from the HD and semi-truck industry

XDP Main Stud Kit 2001-2005 GM 6.6L Duramax LB7/LLY Wire Harness Splitter It’s a true bolt-on upgradeXDP Model XD3007MS The Main Stud Kit XD3007MS is essential for setting up your 2001 2005 GM 6. 6L Duramax LB7 LLY for competition or street use. OEM main bolts typically struggle to handle the pressure in high horsepower engines. Constructed using an 8740 Chrome Moly with an added proprietary element ensures these studs are more durable and will not stretch like the factory bolts. The threads are rolled after heat treating to deliver optimum fatigue