Now used in many engine builds from fast road cars to full on Group A rally cars the Fuji Racing 14mm Head Stud Kit is used by many engine builders/tuners of today. Replacing the 11mm Subaru cylinder head bolts with our 14mm precisely manufactured super high tensile, aircraft grade S99 steel stud and nut system offers many advantages when building your engine. With a tensile strength much higher than that of the OEM bolts and the increased stability provided by the Fuji Racing studs larger diameter when further combined with the more uniform clamping force provided by the stud and nut arrangement it is clear why so many successful engines run these kits!
– Manufactured from certified S99
– Tensile strength between 180,000 and 210,000 psi ( MPa: 1230 – 1420 )
– Precision rolled threads
– Stud pitch into block m14x2