This ARP Custom Age 625+ Head Stud Kit is specifically designed for the BMW S54 engine

it is compatible with alcohol blends of fuel including methanol

It features a long stroke enablement

Because 20-0178 and 20-0179 use tapered threads (NPT)

Each camshaft is engineered with meticulous attention to detail

5150 Classic Beanie SCR11938 This ARP Custom Age 625+Stay warm and represent 5150 AutoSport with this classic black ribbed beanie. Featuring the embroidered 5150 AutoSport logo on the front, this cozy beanie is perfect for keeping you comfortable at the track, in the garage, or at your next car meet. Made from high quality materials, its designed to provide warmth and style no matter where the road takes you. A must have for any performance enthusiast!