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Your cart is empty.(H22A4, VTEC) Built for the Honda Prelude... Obtaining the optimum cylinder head-to-block sealing is especially critical in small displacement engines employing high compression pistons or power adders like turbochargers, nitrous oxide and superchargers. That's why ARP head studs are popular among leading Sport Compact/Import racers.You should know that ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. Following heattreat, 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.You will also note that 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 one that compensates for head gasket compression when the head is installed. This helps prevent blown head gaskets, and assures optimum sealing!
alicia
Reviewed in the United States on December 28, 2018
Great
Mustang Ct
Reviewed in the United States on May 17, 2016
AS EXPECTED, BEST QUALITY
Mike
Reviewed in the United States on February 23, 2014
Used on 1997 Honda Prelude Base (H22A4)If you're changing your head gasket or taking the cylinder head off for any reason, I'd recommend replacing the OEM stretch bolts with ARP Head Studs. You're suppose to replace the head bolts anyway, so why not upgrade ? The studs are excellent quality and the install went smoothly! I will be buying their engine block studs in the future.
Richard Kilpper
Reviewed in the United States on January 30, 2013
You can't go wrong with these studs. ARP makes an awesome product. The moly grease is included, however, I do suggest you buy a deep, 12-pt, 1/2" drive, 14mm socket for installation. It's possible with a 3/8" drive, but the other specs are required.
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