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!
You have to have this bolts if you are going to run high boost....
10
09/19/2011
Supra
10
01/19/2011
Eclipse
Fast shipping. Fitment was perfect and came with their own assembly lube. Easy to follow instructions.
10
01/11/2011
Integra
Ls- perfect no leaks no missing stuff perfect kit
10
07/03/2010
Supra
Install was basic and ARP product are always high quality. Only thing bad about the studs are that the head of the 7mgte can no longer be removed while the motor is still in the car. So, in my opinion, get it right the first time and this won't be an issue.
10
05/09/2010
Integra
Product worked perfect and was early
10
10/30/2009
Civic
exactly what i orderd... im building my block for boost and plan on ordering from them again
10
12/30/2008
S2000
awesome, strong running 800 miles on all the parts they sent me and they are hlding up good. matchup with bc valvetrain and cometic headgasket you have bulletproof s2000
10
10/30/2008
Prelude
10
10/15/2008
Celica
10
07/20/2008
Supra
If you don't know how important these are to maintaining a healthy 7m, you probably don't know why your head gasket blew on you.
WELL worth your money, ESPECIALLY if you're going for higher boost levels (wouldn't want that head lifting, now would you? ;) )
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(9.7 of 10)