ARP Head Stud Kit - BMW E90/E92 M3 S65 4.0L V8 - 201-4307 Mens 14 STI 2007 Subaru Impreza WRX

STI 2007 Subaru Impreza WRX STI 2

black or red hot-side charge pipe

The steel ring at the end of the tether is designed to slide over your shoulder harness end link so they release with your belts

corrosion resistant stainless steel

CNC-Machined 6061 Aluminum

ARP Head Stud Kit - BMW E90/E92 M3 S65 4.0L V8 - 201-4307 Mens 14 STI 2007 Subaru Impreza WRXIt 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. 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 vertically into special racks and precisely heat treated