Genuine ARP 2000 head studs for any 6.2L or 6.5L Diesel build! THESE ARE A QUADSTAR TUNING EXCLUSIVE! Key Features NEW for Q4 2023 These are ARP 2000 material, the next step up from ARP 8740 chromoly like the original kits Over 400,000lbs of clamp force to keep your head gaskets secure even under the highest cylinder pressures Double the clamp load compared to 8740 ARP studs at the same torque specification Allen broached heads for easy installation and removal These work for all variants of 6.2L, 6.5L and P400 6.5L What is ARP 2000 material? "ARP2000 is a heavily alloyed martensitic quench and temper steel, initially developed for use in steam power plants. As such it has excellent stability at high temperatures. But most important, ARP research discovered that in addition to temperature stability it has excellent notch toughness in the higher strength ranges and is alloyed to be tempered to Rc44/47. 8740 and 4340 can be tempered to the same hardness. But, the tempering temperature would yield material in the “temper brittle zone” (between 500° and 700°F), producing significant notch sensitivity. ARP2000 is tempered above that temperature range and has a strength between 200,000 and 220,000 psi" MADE IN USA - If you care about this like we do then stick with ARP!
