Nissan Head Stud Kit - RB20/RB20DET/RB25

The ARP Nissan Head Stud Kit for RB20, RB20DET, and RB25 engines is engineered for builders and enthusiasts who demand reliability under extreme cylinder pressure and thermal cycling. Whether you're running a stock engine or pushing boost on a turbocharged platform, head studs replace factory bolts to provide superior clamping force, eliminate head lift, and prevent gasket failure—especially critical when tuning for higher horsepower or sustained track use. This kit is the foundation of any serious engine build on these legendary Nissan four-cylinder platforms.

Constructed from premium chromoly steel and finished in black oxide, the studs in this kit offer superior tensile strength and fatigue resistance compared to OEM hardware. The included 12-point nuts ensure precise, repeatable torque values and reduce the risk of fastener slip during assembly and operation. ARP's engineering minimizes elastic yield, meaning the studs maintain clamping load across repeated heat cycles—critical for turbo applications where combustion temperatures spike. The chromoly material resists galling and stretching, allowing proper preload without over-torquing, which preserves thread integrity on your cylinder head.

This kit is ideal for RB20, RB20DET, and RB25 owners stepping beyond stock reliability limits or rebuilding after head gasket failure. Installation requires removing the cylinder head and carefully sequencing torque in a cross-pattern to factory specifications; many shops recommend ARP's fastener lubricant for consistent preload. Weighing 3.48 lbs and compact in dimensions, the complete kit ships with all studs and nuts needed for a full head assembly. Professional installation is recommended to ensure correct stretch and prevent damage to the studs or head casting.