ARP Head Stud Kit - Nissan Skyline RB20DE, RB20DET, RB25DE, RB25DET 8740 Alloy - 202-4301 '-1~2.5 BAR 9 mm²/sHTHS viscosity at 150°C

9 mm²/sHTHS viscosity at 150°C (302°F) ASTM D4741 3

60 ° taper runout of screws and bolts is prevented

-4AN 45 Degree Male Adapter To 1/4" NPT Male - Black - 823-04-04-2

the bushings are over 20% lighter than their OEM counterparts

35% increase in coolant capacity

ARP Head Stud Kit - Nissan Skyline RB20DE, RB20DET, RB25DE, RB25DET 8740 Alloy - 202-4301 '-1~2.5 BAR 9 mm²/sHTHS viscosity at 150°CIt 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