ARP 201-4605 Head Stud Kit for BMW 2.3L (S14) 4-cylinder ymm_81 with gains of +25

with gains of +25

F-100 1965-1983

This spacer is designed for use with O2 sensors

further enhancing both torque and power output

including parts cast in Akrapovič’s own titanium foundry

ARP 201-4605 Head Stud Kit for BMW 2.3L (S14) 4-cylinder ymm_81 with gains of +25It 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 uses a premium grade 8740 alloy that is rated far superior to aircraft quality. Each stud is placed vertically in special racks and precisely heat treated to 200, 000 psi. This procedure ensures complete heat