Ease of Fitment Guide |
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• Cylinder head studs manufactured using Aircraft Grade Steel.
• Cylinder head stud thread pitch (Block End): M11X1.25.
• Cylinder head stud thread pitch (Cylinder Head end): M11X1.25.
• Cylinder head stud length: 197mm.
• Kits comprises of:
• X12 Extreme studs.
• X12 Heat treated nuts.
• X12 Heat treated washers.
• X1 Sachet of moly grease.
• X1 Fitting instruction guide.
• Vast improvement in clamping pressure when compared to the original cylinder head bolt.
• Increased seal pressure between the cylinder block face, head gasket and cylinder head face.
• Reduces head gasket wear.
• Reduces cylinder head lift under boost.
• Highly recommended for engines running up to and around 450bhp
All EJ20, EJ22 & EJ25 engines.
If you are unsure of fitment then please check your engine code or contact our sales department
Box Dimensions
Dimensional Weight
Actual Weight
25X11X10 cm
0.5 kg
3.3 kg