ARP Phase 2 SOHC Head Stud Kit 99+ Subaru EJ Series – Import Image Racing
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ARP Phase 2 SOHC Head Stud Kit 99+ Subaru EJ Series

ARP Phase 2 SOHC Head Stud Kit 99+ Subaru EJ Series

SKU: arp260-4702
Availability: 8 In Stock
Product Type: Bolts/Studs
$270.42
$300.48
$270.42
Save $30.06

Regular Price: $300.48 - Instant discount: $30.06 = $270.42


Subtotal: $270.42
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Part #: 260-4702

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi, ensuring complete heat penetration.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.

ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned. 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 (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. Premium quality parallel ground washers are also included with each kit. ARP head studs are a must for performance engines seeing increased boost, and they are truly the best on the market for your Subaru.

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