Increasing engine power with more displacement or providing durability and sealing to a smaller engine requires more than an O.E. production factory-finished bore.

The Engine Experts at Zipper’s have over 4 decades of precision sizing and finishing honing to provide a perfect custom fit, with optimum ring seal to assure your engine makes power.

Our cylinder department technicians have enormous experience and the most advance equipment including the advanced Sunnen SV-30 Honing system.

Zipper’s has custom cylinder kits for M8, Twin Cam and Sportster Engines with a large supply of special pistons and custom domes built to Zipper’s demanding specifications in stock. These are designed for maximum performance and durability. Zipper’s also stocks the most popular shelf brand pistons from CP, KB and Wiseco for precision sizing to your cylinders cores.

If you need your cylinders sized Zipper’s stocks the most popular shelf brand pistons from CP, KB and Wiseco to provide precision sizing to your cylinders cores with an excellent turnaround to keep your shop running smoothly.

Sending your cylinders in for service? Contact us with your needs or fill in a Job order form before shipping.