ARP Chevrolet Gen III/IV LS Series small block – Harmonic Balancer Bolt, 12-Point Black Oxide AR234-2503 Product:fits GM LS Series (Not LS7) M16 X 2.0 Thread x 4.325" UHL, 1-1/16" So Part Number: AR206-4201

Part Number: AR206-4201

5mm coolant port thread

Part Number: AF9590-3000

physical sizes

Part Number: AF2251-3080

ARP Chevrolet Gen III/IV LS Series small block – Harmonic Balancer Bolt, 12-Point Black Oxide AR234-2503 Product:fits GM LS Series (Not LS7) M16 X 2.0 Thread x 4.325" UHL, 1-1/16" So Part Number: AR206-4201Harmonic Balancer Bolt, 12 Point Black Oxidefits GM LS Series (Not LS7) M16 X 2. 0 Thread x 4. 325" UHL, 1 1 16" Socket Brand: ARP Part Number: AR234 2503 Description: As The Crankshaft Flexes And Twists, The Balancer Absorbs Incredible 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