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Your cart is empty.(2.5L(M50), 3.0L(S50US) 3.2L(S52US)) Built for the BMW M3... 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!
Abel B.
2025-08-13 14:54:06
Correct legitimate part, was shipped instantly and was delivered fast. Very satisfied with my order and will order again in the futureðŸ‘ðŸ½
panayiotis
2025-07-15 12:26:12
good quality fast shipping
Blake
2025-06-30 20:34:39
it's ARP so yeh, comes as advertised, haven't installed them yet but everything seems to be in order
Jacob King
2025-03-10 21:43:52
Obviously ARP is high quality. These will fit your m50 and m52 and they are cheaper than bimmerworld.
R^2
2025-02-05 12:31:22
ARP, what more do you need. The way we keep buggering up heads with the racecar, this saves a lot of re-buying stretch to yield head bolts.
Kyle allman
2025-02-01 16:04:04
Exactly what they are supposed to do. Headstud kit for my m52 bmw.
pressdoctor
2024-12-29 19:57:39
Very easy to work with. Unlike factory head bolts, these can be removed and reused. Easy to install with the ARP lubrication included.
Tu N.
2024-12-14 16:01:55
Everything was great as youd expect it to be.
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