Single Head / Main Stud ARAM4.500-1UB Product:10mm X 1.5 Thread X 4.500" OAL (10mm X 1.25 Nut Side) Different spring combinations may be

Different spring combinations may be required to suit different boost requirements and tuning which are sold separately please refer to chart for more information on these springs

3/4" Barb to -10AN AdapterBlack Finish

Male NPT Taper Swivel Straight Hose End 1/2" to -8ANSilver Finish

66-2055BLK

Single Head / Main Stud ARAM4.500-1UB Product:10mm X 1.5 Thread X 4.500" OAL (10mm X 1.25 Nut Side) Different spring combinations may beSingle Head Main Stud10mm X 1. 5 Thread X 4. 500" OAL (10mm X 1. 25 Nut Side) ARAM4. 500 1UB AM4. 500 1UB 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"