Universal Header Bolt Kit 5/16in wrench, 3/8in, .750in UHL Black Oxide 12-Pt Head

Universal Header Bolt Kit 5/16in wrench, 3/8in, .750in UHL Black Oxide 12-Pt HeadARP manufactures a variety of premium grade bolt and stud kits to facilitate installation of exhaust headers including the popular stainless stud kit with 12 point nuts. The ARP Stainless material is not affected by corrosion or extreme heat, making it ideal for the pplication. Whats more, the compact 12 point inut lets you easily slip a socket close to the pipe. Studs are manufactured with a unique nut starter nose that helps prevent cross threading.

The threads are rolled after heat-treating which gives them about 2000% better fatigue strength than most main bolts that are threaded prior to heat-treating

ARP offers High Performance Series bolts that aremade from a premium grade chrome moly and hardened to a nominal tensile strength of 180

you will note that gaskets and cylinder headsliterally glide into position and are perfectly aligned – somethingthat won’t happen with inferior quality head studs

You have a choice between conventional hex head bolts and nuts or compact

and precision J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others

Material 2:

which is substantially stronger than the OEM bolts

A sample chart is as follows: ARP offers a highly accurate stretch gauge with a dial indicator that reads in increments of

We highly recommend using a stretch gauge when installingrod bolts and other fasteners where it is possible to measure thelength of the bolt after tightening

Whether you’re mounting your fan directly to the water pump

ARP main bolts are designed to meet the exacting standards and demands of professional engine builders

each stud is placed verticallyinto special racks and precisely heat-treated to 190