ARP Head Studs - 4G63 (7-Bolt DSM & Evo 4-9)
Fits these Applications:
(7-Bolt 4G63) 1996-2006 Mitsubishi Evolution IV V VI VII VIII IX
(7-Bolt 4G63) 1992-1999 DSM (Eclipse GST/GSX, Talon TSi & Laser)
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.
(1) Assembly Lube
STM didn't have stock for another part in my order. However I asked if the ARP studs could be sent first, in order to verify measurements to rush a block of to the machinist. STM did exactly, with no extra charge. Parts arrived unharmed in great packaging. Thanks
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