Custom ARP 1-2" Head Stud kit for Subaru SOHC EJ25 Hardware Custom Outfront Motorsports spec EJ257

Custom Outfront Motorsports spec EJ257 CP piston set (21cc)

They are then CNC ported to have a big upgrade in flow

it can easily move and shift around from the soft bushings and can wear out overtime

Outfront Motorsports billet fuel rail kit fits the 2

Install Height 1

Custom ARP 1-2" Head Stud kit for Subaru SOHC EJ25 Hardware Custom Outfront Motorsports spec EJ257This is our longer stud specifically made for the SOHC EJ25 engines. This is the next step up from the ARP 260 4702 part number. Benefits: 25% stronger than 625+ studs and 40% stronger than 11mm ARP 2000's Reduced shank diameter (allows for no head gasket modifying) More thread engagement in block over 11mm studs Uses stock alignment pins without modifying case or heads Over 200ft lbs tested for stud "pull out" in block Same kit price compared to 625+