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Your cart is empty.(1.6 and 1.8) Built for the Mazda Miata... 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!
Striball
Reviewed in the United States on May 21, 2024
So far has done what they need to do I hope! Was sealed and new in box, torqued to 3 steps to final torque and used the install lube as suggested and all is well. ARP is always a good buy, and a good value for money here imo
Gunnar
Reviewed in the United States on February 18, 2021
Follow the instructions and they are brilliant
Privacy Matters
Reviewed in the United States on November 11, 2020
Mazda engines fail at the head gasket. When Mazda engines fail, Mazda customer service should fix with Mazda labor, installing ARP head STUDS.
Justin M
Reviewed in the United States on November 2, 2017
Must have for race engine
Cheryl Schmidt
Reviewed in the United States on January 20, 2017
Son loved his Christmas gift.
Patrick J.
Reviewed in the United States on June 2, 2016
Running tons of boost on these, no problems.
Scott
Reviewed in the United States on May 2, 2016
So far so good. They exactly as they should and to be good.
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