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Builds requiring external wastegate control
(For detailed instructions with pictures
Pressure Test Kit -4AN
The Plumb Back system recirculates all excess pressure back into the intake system
Single Head / Main Stud G25 Builds requiring external wastegate control1 2" Thread X 4. 750" OAL Part Number : ARAR4. 750 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
