ARP Cylinder Head Stud Kit
When it comes to adding horsepower to your car one of the main keys is making sure you have a good seal between the cylinder heads and engine block. As power goes up pressure increase in the cylinders, which then push up on the cylinder heads. Once you reach a certain point/power, your cylinder heads can lift off the block and you lose seal and compression. Once you reach that point the OEM head bolts are not up to the task and you need to look at upgrading to a stronger head stud (we have seen the need for head studs as early as 300whp on a nitrous vehicle).
ARP has been tested and ran by professionals for many decades ( Including our own vehicles) and have been proven to stand up to the toughest conditions and power. One of the key features that head studs have over head bolts is their ability to be used over and over, where head bolts are usually torque to yield and stretch after the first install. This allows the user the ability to pull the heads over and over to perform maintenance, where with head bolts they would need to replace them. On top of that, heads stud provide a much better clamping force straight down, where head bolts have more of a twisting force due to the entire bolt being torqued down, where with a stud it sits in the head and the nut is applying all of the downward clamping force. On top of that, ARP head studs are made from a much stronger material then OEM bolts, having a greater Tensile strength then OEM and prevent the heads from lifting. This can be seen in the ARP torque spec of 95ft lbs, where OEM specs is only 76ft lbs.
Our ARP Head Stud kit has been assembled specifically for your Jseries motor, including all the required Studs, Nuts, Washers and Torque Lube.