Why are head studs better than head bolts for a turbo engine?

Head studs provide a more consistent clamping force on the cylinder head compared to bolts. This is crucial for turbo engines that experience higher cylinder pressures and temperatures, helping to prevent head gasket leaks and ensure a reliable seal.

What material are these ARP head studs made from?

These studs are made from ARP's 8740 alloy steel, which is heat-treated to achieve a tensile strength of 200,000 psi. The stainless steel construction also offers good corrosion resistance.

Do I need any special tools to install these head studs?

Installation typically requires standard engine building tools, including torque wrenches to ensure proper tightening of the nuts and studs. Always refer to the manufacturer's installation instructions for specific torque values and procedures.

ARP

ARP Porsche 911-930 turbo SS Head Stud Kit

Name: ARP Porsche 911-930 turbo SS Head Stud Kit
Brand: ARP
Price: 1031.37 USD
Availability: InStock

$1031.37

ARP Porsche 911-930 turbo SS Head Stud Kit. Stronger than stock bolts for reliable turbo engine builds.

Key Features

Direct fit — verified for 1976-1997 Porsche 911 and 1978-1979 Porsche 930
Stronger than stock — heat-treated 8740 alloy steel studs rated to 200,000 psi tensile strength
Improved thread strength — threads are rolled after heat treatment to prevent premature fatigue
Corrosion resistant — stainless steel construction resists rust and wear
Complete kit — includes studs, nuts, and washers for a full engine build

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Fits these vehicles

Porsche 911 1976-1977, 1986-1989, 1991-1994, 1996-1997
Porsche 930 1978-1979

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Product Details

ARP makes this Stainless Steel Head Stud Kit for the Porsche 911 and 930 turbo engines. If you're building or rebuilding a turbocharged 911 engine, especially one that will see higher boost pressures, you need head studs that can handle the extra stress. These ARP studs are a solid upgrade over the factory head bolts, ensuring your cylinder heads stay sealed under demanding conditions.

This kit uses ARP's 8740 alloy steel, heat-treated to 200,000 psi tensile strength. The threads are rolled after heat treatment, which makes them stronger and less prone to fatigue than threads that are cut. The kit includes the necessary nuts and washers, all made from quality materials to match the studs.