Colony Rocker Box Bolt Kits

4 products — part of all Rocker Box Bolt Kits

Colony rocker box bolt kits cover the top-end hardware for Harley-Davidson's classic engine era from Knucklehead through to the late Ironhead Sportster — 1936–1947 Knucklehead, 1948–1965 Panhead, 1957–1976 XL Sportster, and 1977–1985 XL Sportster. These are complete kits: every fastener for both rocker boxes in the correct diameter, thread pitch, and length for the specific engine year. Colony's chrome hardware quality matters here because these fasteners are visible on an engine already wearing polished cases or chrome covers — one wrong-finish bolt stands out on a restored Knucklehead the way a scratched lens stands out on a concourse car. The torque specs and clamping requirements differ between the Knucklehead, Panhead, and Ironhead designs; Colony provides period-correct hardware rather than a universal approximation. Iron City Motorcycles, your authorised Harley-Davidson dealer in Leeds, stocks Colony rocker box bolt kits for vintage restoration builds. Browse the full Colony Rocker Box Bolt Kits range below.