The block end of the stud...note the difference on the end of the stud itself....you may be able to see it, but the body of the inferior stud is very " stratchy", you could feel it on your finger nail at each cut of the stud, vs the ARP, very smooth and hard. You will also notice where the shank and the threads meet, notice the rolled threads, the chamfer, and the overall apperance.
ARP on left, unknown on right.
I only have 2 sets of these here now, already spoken for, I can get more fairly quickly if anyone wants them, just PM me.
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WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
