Thread: how to fit arp head studs?/ how do i recognize a -31 actuato
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Old Oct 14, 2006 | 11:41 PM
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jon@work
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some people no longer recomend the use of the short ARP studs - stick with the standard headbolts, or fit the long studs from Mountune.

"31" are the last 2 digits of the part number of the "-31" actuators
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