ARP Custom Age Head Stud Kit Subaru WRX 2002-2014 / STI 2004-2021 DOHC vendor_Manley Performance with four valve reliefs

with four valve reliefs

-Reduces wheel hop / traction loss

High quality 9310 steel wrist pins and JE Pro Seal Rings are included

and the exhaust tone is crisp and strong

Removing the second catalytic converters on your Ralliart will net you big gains

ARP Custom Age Head Stud Kit Subaru WRX 2002-2014 / STI 2004-2021 DOHC vendor_Manley Performance with four valve reliefsPart #: 260 4704 If you are planning on making 500 675whp, these are the head studs for you! ARP head studs for your Subaru WRX and STI ARP uses a premium grade 8740 chrome moly that is rated far superior to "aircraft" quality. Then, each stud is placed vertically in special racks and precisely heat treated to 270,000 psi. These studs use a 12 point style nut and are OE 11mm sized. The head of the stud uses a 4mm Allen to thread the studs into the