ARP Head Stud Kit for Subaru WRX EJ20 & EJ25

ARP Head Stud Kit for Subaru WRX EJ20 & EJ25 Upgrade engine reliability and unlock power potential with the ARP Head Stud Kit engineered for Subaru WRX EJ20 and EJ25 engines. Precision-manufactured from high-strength alloy, these studs provide consistent clamping force to preserve head gasket integrity under high boost and high-RPM conditions. Application: Subaru WRX EJ20 & EJ25 — fits many model years Material: Heat-treated ARP 2000 (or equivalent) alloy for superior fatigue resistance Design: Optimized length and thread engagement for correct head-to-block clamping Performance: Ideal for turbocharged, high-boost and high-horsepower builds Durability: Minimizes stretch and maintains torque through thermal cycling Designed for easy installation with OEM or upgraded head gaskets, the kit ensures uniform clamping across all cylinders to reduce leaks, prevent head warpage, and improve sealing under extreme conditions. Perfect for street, track, and competition applications where reliability matters. Buy with confidence: ARP is the industry standard for fastener reliability—engineered for performance and built to last.