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ARP 02-14 WRX/ 04-21 STI/ 05-12 Legacy GT/ 04-13 Forester XT Head Studs 11mm Subaru Turbo Models | 260-4701

$45.99

€42.95

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SKU: arp260-4701 Category: ARP Tags: arp, cleanupproject, Engine, Engine Builds, Engine Builds Shop All, Engine Shop All, Forester 03-08, Forester 09-13, Hide Universal Parts, leasable, Legacy 05-09, Legacy 10-14, On Sale, Performance Hardware, Save 12% w/code NEWYEAR, STI 04-07, STI 08-14, STI 15+, subaru, WRX 02-05, WRX 06-07, WRX 08-14

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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 200,000 psi.

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.