XDP X220 Series Head Stud Kit XD3006HS Early Cummins 5.9 the X-TRA Cool Radiators have

the X-TRA Cool Radiators have more internal strength due to reinforced end tubes and outside corners where the core is most vulnerable

Perfect for the toolbox of the at-home Duramax enthusiast

To ensure a complete and proper repair

Protect the cooling system in your 1999

reinforcement ribs are added to weak points to increase longevity and help eliminate another common failure point found in the OE design

XDP X220 Series Head Stud Kit XD3006HS Early Cummins 5.9 the X-TRA Cool Radiators haveThe XDP X220 Series Head Stud Kit XD3006HS is a must have for your high performance 2001 2016 GM 6. 6L Duramax LB7 LLY LBZ LMM LML. The OEM head bolts typically can't handle the pressure from high horsepower applications. Constructed using 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 strength.