ARP K-Series Head Stud Kit
Part Number: 208-4701
Inside Continental United States
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Will It Fit Your Vehicle?
Fitment NotesWill not fit the K24Z7 Engine
K Series Parts has used ARP head studs in almost every k-series motor we have built. We highly recommend them for any K20 and K24 motor build!
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 is 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 engines. This procedure (done only to the shorter studs) more equalizes the stretch of both studs, which makes for a more consistent clamping force and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing!
Premium quality heat-treated 8740 chrome moly steel head stud kits are available for most every domestic and import application. You won't find a better quality stud on the market from any other source. Look for ARP. stamped on each stud as your assurance of quality.
|Vehicle Notes:||Will not fit the K24Z7 Engine|
5 reviews for ARP K-Series Head Stud Kit
5 out of 5.0
3/31/2016 by Jasmin Buric
Just like it was advertised... Superb customer service.
9/28/2012 by Ryan fetrow
Product worked exactly as expected, currently hold 555whp on a k20a
12/10/2011 by Clinton Proctor
Simply the best headstuds
Worked great for my Rsx a2 head build. no stretch and firm fit. Perfect!!! Thanks CRSX for the pre-order and fast shipping with great price!!!!!
7/28/2008 by Hamburglar
These studs have seen over 23psi and 575whp. Should be the last ones I ever need!
7/17/2008 by cookiemanishere
excellent product would buy again if the occation araises.