Subaru EJ20 and EJ25 DOHC Head Stud Kit

Aeroflow Performance head studs greatly improve your cylinder head-to-block sealing compatibilities.

This is important in engines with high power adders such as turbochargers, superchargers or nitrous. They can even be a great addition to a mildly modified build as insurance against failure. All head studs provide a more accurate and consistent torque loading over traditional head bolts.

These head studs are manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the stud. Meaning these studs are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. All kits come complete with 12-point nuts and hardened washers for an even load distribution and accurate torque readings.

Kit Contains

12 x Studs
195mm Overall Length
123.95mm Shank Length
9.30mm Shank Diameter
M11 x 1.25mm thread into Engine Block
M11 x 1.25mm thread on Nut End

12 x 12 Point Nuts
M11 x 1.25mm Thread
18.30mm Outside Diameter
11.80mm Height
1/2 Spanner Size

12 x Flat Washers
24.85mm Outside Diameter
11.30mm Inside Diameter
3mm Thickness