ARP Duramax 6.6L (2001-2016)(LB7/LLY/LBZ/LMM) ARP2000 Kit #: 230-4201
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It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, theres not a better stud setup on the market today. ARP uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. ARP studs are thread rolled after heat-treat, which gives them about 1000% (thats ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). You wont find a better quality stud on the market from any other source. ARP 230-4201 head studs for the GMChevy Duramax 6.6L. Part number 230-4201 fits GM/Chevy diesel years 2001-2016