M8 x 1.25 x 80 12pt SS bolts

M8 x 1.25 x 80 12pt SS boltsMaterial: Stainless Steel Finish: Polished Material 2: Finish 2: Origin: USA

large underhead radius and rolled threads for the utmost in reliability

each stud is centerless ground to makeit as close to perfectly concentric as possible

To be used with ARP’s patented Perma-Loc™ adjusters

They’re forged from premium grade 8740 chrome moly steel and are heat-treated to a nominal rating of 190

you will note that gaskets and cylinder headsliterally glide into position and are perfectly aligned – somethingthat won’t happen with inferior quality head studs

Specially drilled “NASCAR” models are available for those who wish to safety wire their header bolts to prevent loosening

000 psi tensile strength material where noted

and female O-ring types

and are available in 8740 chromemoly with a black oxide finish or ARP Stainless

the set screw is machined flush on the bottom (not pointed) so it will have optimum contact on the rocker arm stud

Excellent for E

If you have ever installed a rocker stud into a cylinder head and watched it wobble as it screwed in – you knew from the beginning that the rocker geometry was going to be inconsistent all over the place