ARP 235-3703 Head Bolt Kit for CHEVROLET Big Block Mark IV block with Late Bowtie aluminum. Iron Dart. Pro-1. Pro Top Line. & World Products iron heads ymm_48 these bolts ensure secure main

these bolts ensure secure main cap retention under extreme operating conditions

If the car is equipped with performance exhaust with electronic valve actuators than actuator set P-HF1006 is required and the Akrapovic sound kit P-HF1003 can not be used

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE

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4mm Allen Material: 8740 Chromoly

ARP 235-3703 Head Bolt Kit for CHEVROLET Big Block Mark IV block with Late Bowtie aluminum. Iron Dart. Pro-1. Pro Top Line. & World Products iron heads ymm_48 these bolts ensure secure mainSpecifications Socket Size(s) 1 2 12pt