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Four separate stages can be activated independently for nitrous users as well
Small-displacement 6-cylinder builds
Lifetime warranty on PRP Billet hardware
including a mounting system
Single Head / Main Stud Low Profile Four separate stages can be1 2" Thread X 4. 250" OAL Part Number : ARAR4. 250 1LB 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, there's not a better stud setup on the market today. For openers, ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated far superior to "aircraft" quality alloy steels. Secondly, each stud is placed
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