ARP Crank Pulley Bolt Chev LS Gen 3 & 4 12PT - 234-2503

GM LS Series (Not LS7) M16 X 2.0 Thread x 4.325" UHL, 1-1/16" Socket

As The Crankshaft Flexes And Twists, The Balancer Absorbs In credible Amounts Of Kinetic Energy. To Ensure That The Balancer Is Locked In Position Arp Has Developed These Ultra Strong 200,000 Psi Bolts That Let You Exert Maximum Clamping Force. Special Features Include 1 /4 Thick, Wide Area Washer And An Extra Tall 12-point Head T hat Accepts A Deep Socket And Eliminates The Worry Of Stripping The Head.