ARP Honda 1.5L L15 SOHC 4cyl head stud kit

Fits the Honda Fit 1.5L

It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition power plants.

ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated far superior to aircraft quality alloy steels. Also, each stud is placed vertically into special racks and precisely heat-treated to 200,000 psi for the 8740 material and 220,000 psi for the ARP2000 material. This procedure ensures complete heat penetration and the results are far superior.

Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible, then thread rolled, which gives them about 2000% (that's 20x) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice).

ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the stretch of both studs, which makes for a more consistent clamping force and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing!

Because ARP studs are manufactured to such exacting tolerances, gaskets and cylinder heads literally glide into position and are perfectly aligned.