It so for good reason that virtually every top professional engine
builder relies on ARP Pro Series head for their all-out competition
powerplants. Simply stated, there's not a better stud setup on the
market today. For openers, 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 190,000 psi.
this procedure ensures complete heat penetration and the results are
far superior to those lesser quality studs from other manufacturers who
just dump pieces in a basket and hope for the best. You will also note
that ARP offers specially undercut studs for several engines. This
procedure (done only to the shorter studs) more equalizes the "stretch"
of both studs, which makes for a more consistent clamping force-and one
that compensates for engine sealing! ARP head stud kits are available
with your choice of conventional hex nuts or compact 12-point nuts.
Premium quality parallel ground washers are also included with each
kit. Clearly, they are the best on the market today, and the favorite
of leading professional engine builders in all forms of racing.
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