HP Wave 8740 Complete Rod Bolt Kit for Subaru 1.8L (EJ18) & 2.2L (EJ22) SOHC, 2.5L (EJ25) S0HC/DOHC

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.The same heat-treated 8740 chrome moly steel is used to make these rod bolts as ARP’s standard High Performance rod bolts. The big difference is in the shank design, with ARP’s exclusive (and patented) Wave-Loc technology providing substantial benefits. Because there are fairly wide tolerances in factory bolt holes, the bolt must be able to fit snugly and a knurl is applied. Unfortunately, these knurls cut deep into the bolt material, leaving sharp edges and enormous “stress risers” that promote failure. That’s why ARP developed the Wave-Loc design that features symmetrical waves and has an effective interference range of .001? to .005? for proper cap alignment.

• Material: ARP2000
• Finish: Polished
• Material 2:
• Finish 2:
• Origin: USA