Compatible with VW Golf/Jetta 1.8L 16V;

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 only uses premium 8740 alloy and a proprietary ARP2000® alloy that are rated far superior to "aircraft" quality alloy steels. Secondly, each stud is placed vertically into special racks and precisely heat-treated to 190,000 psi for the 8740 material and 220,000 psi for the ARP2000® material. This procedure ensures complete heat penetration and the results are far superior to those lesser quality stud form other manufacturers who just dump pieces into 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. It's important to note that lesser quality studs are not even centerless ground- the material is thread rolled in bar stock form (typically before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will not that gaskets and cylinder heads literally glide into position and are perfectly aligned - something that typically won't happen with inferior quality head studs.

ARP stud are thread rolled after heat-treat, which gives them about 2000% (that's twenty times) better fatigue strength than those studs that are threaded prior to heat-treat. 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 not that ARP offers specially undercut studs for many specialty engines. This procedure 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 assure optimum engine sealing!;

ARP 204-4204 Head Stud Kit

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Part Number:

Product Description

Compatible with VW Golf/Jetta 1.8L 16V;

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 only uses premium 8740 alloy and a proprietary ARP2000® alloy that are rated far superior to "aircraft" quality alloy steels. Secondly, each stud is placed vertically into special racks and precisely heat-treated to 190,000 psi for the 8740 material and 220,000 psi for the ARP2000® material. This procedure ensures complete heat penetration and the results are far superior to those lesser quality stud form other manufacturers who just dump pieces into 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. It's important to note that lesser quality studs are not even centerless ground- the material is thread rolled in bar stock form (typically before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will not that gaskets and cylinder heads literally glide into position and are perfectly aligned - something that typically won't happen with inferior quality head studs.

ARP stud are thread rolled after heat-treat, which gives them about 2000% (that's twenty times) better fatigue strength than those studs that are threaded prior to heat-treat. 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 not that ARP offers specially undercut studs for many specialty engines. This procedure 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 assure optimum engine sealing!;

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