ARP Chevrolet, Small Block inner rows, stainless steel outer row) – SB Chevy 23 degree pro action head, head bolt kit 134-3604 Powerhouse Products Part Number: AF37-2456

Part Number: AF37-2456

Part Number: AF9203-400-350

Manufacturer's Part Number: 999-9144

Part Number: AF455-16-12BLK

ARP Chevrolet, Small Block inner rows, stainless steel outer row) – SB Chevy 23 degree pro action head, head bolt kit 134-3604 Powerhouse Products Part Number: AF37-2456ARP SB Chevy 23degree pro action head, head bolt kit (134 3604) ARP High Performance Series Cylinder Head Bolt Kits 134 3604 ARP High Performance Series head bolt kits are tough. They are rated at 180,000 psi 15 percent stronger than Grade 8 fasteners. They come available with a reduced wrenching hex head or 12 point head that help eliminate the need for valvetrain removal when re torqueing cylinder heads. Brand: ARP Manufacturer's Part Number: 134