Here are some pics of the coils and distributor. The distributor is billet aluminum with roller bearings on the shaft instead of a bronze bushing. It also runs a GM Melonized gear. The pickup wheel is hard coat anodized so it will not rust. The 3 large holes in the top of the wheel are balancing holes. The entire rotating assembly is balanced. It also uses a GM pickup sensor that is readily available. It is a really sharp piece.