These Pro series cylinder head bolts from ARP are cold-forged to ensure molecular integrity.
They are heat-treated prior to thread rolling and machining, and are rated at a whopping 190,000 psi.
The Pro series are also available with hex and 12-point heads.
All kits come complete with hardened parallel washers for even load distribution and accurate torque readings.
- 4G63 DOHC Engines M11 Thread from 1994 +(11mm Stud)
- Also fits 4G63/64/69 Engine varations from 1994 Onwards.