8618-20 12-point ''big bore'' head bolt kit. Black

Colony’s 12-point big bore head bolt kit is a professional-grade solution for anyone running high-performance cylinders on 1948 to 1984 Panhead and Shovelhead models. These bolts feature a durable black oxide finish and come complete with the necessary washers for a clean installation. While they are traditionally engineered for big bore applications where clearance around the cylinder head is tight, they also offer a much sharper, more technical look for stock engines compared to standard hex hardware. The 12-point design allows for superior tool engagement in restricted spaces, ensuring you can achieve precise torque without the risk of rounding off the heads. This kit is a high-quality fastener solution that combines practical clearance benefits with a custom aesthetic for classic Big Twin motors.