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ARP Main Stud Kit 350Z 2002-08

ARP Main Stud Kit 350Z 2002-08
Properly torqued head and main studs allow for a more uniform and stronger seal between the head and block, and the main caps and block. Every built motor should be using studs instead of bolts. We consider these cheap insurance against a blow headgasket, or a walking crank.

More Detail from countesy of ARP:

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.

For openers, ARP® uses a premium grade 8740 alloy that is rated far superior to “aircraft” quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.

Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It’s important to note that lesser quality studs are not even centerless ground—the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP® studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned—something that won’t happen with inferior quality head studs.

ARP® studs are thread rolled after heat-treat, which gives them about 1000% (that’s ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it’s tough on tooling, but the results are well worth the extra effort.
You will also note that ARP® offers specially undercut studs for several
42%
SKU ARP-VQ35-Studs
Weight 10.00 lbs
 
Market price: $339.00
Our price: $195.00
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