ARP 400-1112 Header Bolt & Stud Kit for Chevrolet Big Block. 1.000˝ UHL ymm_30 The exhaust valve – with

The exhaust valve – with its housing cast in the in-house foundry – gives the sound from the exhaust a richer and higher frequency than stock

Specifications Knurl Diameter UHL Knurl Length Nose Length Diameter - Pitch Wheel Stud Hole Size - Cast Iron/Steel Hub Cast Iron/Steel Hub Drill Bit Size (actual dim

rising to a true sporty sound at higher revs

ARP Pro Series head bolt kits are application specific – designed for use with typically competition only components

By replacing standard bolts with high-strength studs

ARP 400-1112 Header Bolt & Stud Kit for Chevrolet Big Block. 1.000˝ UHL ymm_30 The exhaust valve – withSpecifications Socket Size(s) 3 8 hex UHL (Qty: 16) 1. 000 Thread Size 3 8 washers included