Factory side bolts are torque to yield design and must be replaced when rebuilding as they are not reusable. These high quality ARP side bolts are designed to be used over and over again, plus will offer the best clamping forces for high performance engines. Sold in complete sets for one engine
~Late (01-up) Aluminum 4.6 WAP (2V, 3V, or 4V) Blocks with 9mm Side Bolts Aluminum 5.4 GT Blocks with 9mm Side Bolts 2011-UP Coyote 5.0L Aluminum Blocks
~4.6 Cast Iron Romeo Blocks with 8mm Side Bolts 03-04 Cobra 4V Cast iron Romeo Blocks with 8mm Side Bolts 156-5201
