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ARP HEAD STUDS KIT SUBARU EJ20/25 2002-2014 WRX / 2004-2015 STI L19
ARP 260-4707
The product is currently on backorder as the stock availability is unable to cater to the demand. Estimated delivery time will be one to two weeks. Payment upfront is needed for order confirmation. Waiting duration varies with the transit from manufacturer and other unforeseen circumstances. Thus, we strongly recommend for your kind patience on such orders. An update via email will be notified of when this item arrives back in stock.
1 Item
| Part #: | ARP 260-4707 |
| Brand: | ARP |
| Mfgr. Warranty: | No Warranty |
| Head Alteration Required: | No |
| Length: | OEM Spec |
| Location: | Head |
| Machining Required: | No |
| Material: | 8740 chrome moly steel |
| Quantity: | 12 |
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.
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