Born from a short-track engine shop in 1978, Zipper’s Performance Products manufactures and distributes aftermarket performance parts for Harley-Davidson motorcycles while providing in-house engine-component machining from its Elkridge, Maryland facility. Racing remains central to the independently owned company, whose work includes CNC cylinder-head development and machine services shaped by competition experience. Zipper’s has served the performance motorcycle industry since establishing its first commercial location in 1981 and ships its products to customers worldwide.