1/4-20 x 0.515 12pt SS bolts

1/4-20 x 0.515 12pt SS boltsMaterial: Stainless Steel Finish: Polished Material 2: Finish 2: Origin: USA

which requires less energy to operate

ARP manufactures a variety of special application-specific bolt and stud kits

with threads rolled after heat treat to ensure the optimum fatigue strength

and designed for use in competition engines

Increased material strength overcomes valve train harmonics and stress

L19 is a very high strength material compared to 8740 and ARP2000 and is capable of delivering a clamp load at 260

Washers and nuts included where applicable

It costs a lot more to do it this way

There are several important reasons why ARP’s exclusive Perma-Loc rocker arm adjusters won’t loosen like others

as well as hex or 12-point heads

Forged from 8740 chrome moly steel

The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today’s sticky tire compounds or the acceleration and deceleration of oval track cars put considerable strain on the ring gear