ARP 627-4000 SAE Bolt Kit 1/2-13 x 4.000 12pt black oxide bolts ymm_47 which makes them about 1000%

which makes them about 1000% longer fatigue life than most main bolts

Auto dimming sensor delivers ideal display brightness

Superior material grain flow because of patented Wave-Loc surface design as compared to knurled bolts that have sharp edges and “built-in” stress risers

this link pipe set conveys pure racing emotion and great feedback at high revs

Chevelle 1966-1973

ARP 627-4000 SAE Bolt Kit 1/2-13 x 4.000 12pt black oxide bolts ymm_47 which makes them about 1000%Specifications Socket Size(s) 9 16 12pt UHL 4. 000 Thread Length 1. 250 Grip Length 2. 750 Thread Diameter Pitch 1 2 13 Grip Diameter 1 2 Wrenching 9 16 Head Height 0. 450 Collar Diameter 0. 850