12.9 Grade Alloy Steel Cylinder Head M8 Hex Studs

All of our engine models use these 12.9 grade alloy steel hex M8 engine head studs. They allow for much easier installation and dismantling with the use of Allen keys.

Please note that we offer two different sizes, 80mm and 90mm.

Fits: 80mm - ZR12 Jr., ZR16 Entry Level, ZR22 Intermediate, 90mm - ZR28 Racing.