ARP Main Stud Kit - B18A/B20 AWD offering reduced restriction and allowing

offering reduced restriction and allowing exhaust gases to flow out of the engine faster

which improves mid-range power and throttle response significantly

Note: 4pt lower boot brace not included (and not available for EG3dr)

each injector is then pressure tested up to 220 psi

ARP Main Stud Kit - B18A/B20 AWD offering reduced restriction and allowingARP Main Stud Kit B18A B20 ARP Main Stud Kit B18A B20 These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile strength rating. They are precision centerless ground and thread rolled to Mil S 8879 specs, with a black oxide finish for corrosion resistance. The kits come complete with hardened washers and high strength hex nuts.