Head Studs

These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide finish for corrosion resistance. The kits come complete...

ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all kits come complete with hardened parallel...

ARP high-performance cylinder head stud kits are precision centerless-ground and thread-rolled to Mil-S-8879 specs. Their black oxide finish protects them from wear and corrosion, and ARP throws in hardened parallel washers for uniform load distribution...

ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all kits come complete with hardened parallel...

It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there's not a better stud setup on the market today. ARP uses a premium grade 8740...

Running a big single turbo or twins? Head studs are a must if you are pushing in excess of 45psi of boost. Why take the chance of ruining your day at the track or worse, doing permanent engine damage. With performance enthusiasts adding increasing...

ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all kits come complete with hardened parallel...

ARP main stud kits are made from 8740 Chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide finish for corrosion resistance. The kits come complete...

ARP recommends the use of main studs over bolts whenever possible for several key reasons. First is the ability to obtain more accurate torque readings because studs don't "twist" into the block. All clamping forces are on one axis. By the same token,...

ARP 250-4201 Headstud kit for 94-03 Ford 7.3L Powerstroke - 12mm*ARP Studs are NOT RETURNABLE if factory packaging is broken.

ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all kits come complete with hardened parallel...

To overcome head gasket failures that can occur in diesel engines employed in truck and RV applications, industry leader ARP has introduced extra heavy-duty head studs for the popular Ford, Dodge and GM powerplants. These ARP studs are rated at 220,000...

Today's critical diesel fasteners - head studs and bolts, main studs and bolts, and driveline - have been designed stronger than ever before to handle the extreme loads. As a results, installation pre-loads - the amount the fastener is stretched during...

ARP 250-4301 6.7L Powerstroke Headstud Kit. ARP Head stud kits help keep cylinder pressure where it belongs, in the cylinder. By using high strength materials during ARPs meticulous heat treating process we are able to provide a fastener that can...

ARP 250-5801 Main Stud Kit for 94-03 7.3L Powerstroke*ARP Studs are NOT RETURNABLE if factory packaging is broken.

ARP 250-5802 Ford 6.7 Powerstroke main Stud Kit

These Pro series studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 190,000 psi. The Pro series kits are also available with 12-point nuts, and all kits...

ARP Duramax Main Stud Kit - Fits Model years 2001-05 (LB7/LLY) This is a must for High HP applications, these specialty bolt will keep the main caps from walking at High Horse Power and High RPM's.*ARP Studs are NOT RETURNABLE if factory packaging is...

ARP 247-5402 Main Stud kit for 1997 & Earlier 5.9L Cummins*ARP Studs are NOT RETURNABLE if factory packaging is broken.

ARP main stud kits help eliminate main cap walk/fretting and protect the threads in your engine block. They include studs made from 8740 Chromoly steel and heat-treated in-house to 190,000 psi tensile-strength rating. The precision J-form threads are...

An ARP cylinder head stud kit is a precision centerless-ground for accuracy. Thread-rolled to Mil-S-8879 specifications for increased strength while reducing stress at the threads. Hardened parallel washers for uniform load distribution and accurate...

Increasing the boost that is fed into your truck engine is great for horsepower, but it places additional stress on stock pieces that were not designed to take them. Such is the case with the main bolts. Thankfully ARP produces cylinder Main Stud Kits...

Increasing the boost that is fed into your truck engine is great for horsepower, but it places additional stress on stock pieces that were not designed to take them. Such is the case with the main bolts. Thankfully ARP produces cylinder Main Stud Kits...

An ARP cylinder head stud kit is a precision centerless-ground for accuracy. Thread-rolled to Mil-S-8879 specifications for increased strength while reducing stress at the threads. Hardened parallel washers for uniform load distribution and accurate...

An ARP cylinder head stud kit is a precision centerless-ground for accuracy. Thread-rolled to Mil-S-8879 specifications for increased strength while reducing stress at the threads. Hardened parallel washers for uniform load distribution and accurate...

An ARP cylinder head stud kit is a precision centerless-ground for accuracy. Thread-rolled to Mil-S-8879 specifications for increased strength while reducing stress at the threads. Hardened parallel washers for uniform load distribution and accurate...

An ARP cylinder head stud kit is a precision centerless-ground for accuracy. Thread-rolled to Mil-S-8879 specifications for increased strength while reducing stress at the threads. Hardened parallel washers for uniform load distribution and accurate...