Hi-Perf 8740 Complete Rod Bolt Kit for Ford 239-256-272-292 Y block (rod marked ECZ)

Hi-Perf 8740 Complete Rod Bolt Kit for Ford 239-256-272-292 Y block (rod marked ECZ)Because factory connecting rods (or aftermarket versions of OEM rods) are used in a variety of applications from rebuilt stock motors to modified powerplants used in circle track, marine and drag racing engines including those with superchargers and or nitrous oxide injection systems ARP offers replacement rod bolts in three different models. All of them are substantially better than the stock OEM and most aftermarket bolts. For the most severe

Material 2: 8740 Chrome Moly

ARP only uses premium grade 8740 alloy anda proprietary ARP2000® alloy that are rated far superior to “aircraft”quality alloy steels

HIGH PERFORMANCE SERIESHigh Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates theneed for valve train removal to facilitate cylinder head retorquing

This procedureinvolves about ten very slight cuts and results in an exceptionallystraight part

Increased material strength overcomes valve train harmonics and stress

ARP rocker studs are concentric within

Material: 8740 Chrome Moly

You will note that ARP studs feature a special “bullet nose” to guide the nut accurately into place

as well as with a conventional hex head or 12-point (great for tight

substantially stronger than Grade 8 hardware

when the material iseasier to machine)

The popular High Performance Series is rated at 180