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All Pro Series head bolts have a reduced wrenching hex or 12-point head and wide area flange to eliminate the need for valve train removal for cylinder head retorquing and permits the use of larger diameter valve springs
9 LSU sensor features the same fuel compatibility as the 4
Top Outside Diameter: 5
Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength
The specially alloyed “ARP 300” stainless steel and heat-treated 8740 chrome moly bolts (black oxide finish) are nominally rated at 180
ARP 203-4702 Head Stud Kit for TOYOTA Supra 2JZA80 undercut ymm_82 All Pro Series head boltsIt is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all out competition powerplants. Simply stated, theres 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. Each stud is placed vertically in special racks and precisely heat treated to 200, 000 psi. This procedure ensures complete heat
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