ARP 400-1217 Header Bolt & Stud Kit for Chevrolet Big Block. 0.875˝ UHL. ARP Stainless. 12pt ymm_23 remapping the ECU is mandatory

remapping the ECU is mandatory to prevent potential “check engine light” warning signals

573˝ Cast Iron/Steel Hub Drill Bit Size (actual dim

Its beautiful and sleek design is finished with a central muffler with two pairs of eye-catching double round tailpipes – available in either handmade carbon fibre or sandblasted and coated titanium for increased durability – and it incorporates exhaust-valve housings cast in the Akrapovič in-house foundry

- Turbobuff is improved and exhaust gas flow is optimized to improve turbine rotation time and throttle response

ARP 400-1217 Header Bolt & Stud Kit for Chevrolet Big Block. 0.875˝ UHL. ARP Stainless. 12pt ymm_23 remapping the ECU is mandatorySpecifications Socket Size(s) 3 8 12pt