ARP Cylinder Head Studs for Rover V8 3.9L 4.0L 4.2L 4.6L (10 studs) - 157-4301
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- Collection at our shopCartagena, Spain
ARP 157-4301 head studs are made for the Rover V8 3.9L 4.0L 4.2L 4.6L (10 studs). Replacing stock bolts with studs helps keep the head gasket sealed when the engine is running with higher turbo pressure or higher compression.
They are manufactured from 8740 chrome-moly steel, heat-treated in-house by ARP to a tensile strength of approximately 190,000 psi. Each stud is centerless ground after heat treatment to ensure it is perfectly concentric, allowing the gasket and cylinder head to seat accurately, and the threads are rolled after heat treatment, which ARP claims increases fatigue strength by up to twenty times.
Use ARP assembly lubricant and their specified torque values, as the load applied to each part will not be the same with a different lubricant. If you have any doubts about whether this is the correct part for your engine, please contact us with your engine code and year.