For over 27 years, Zipper's Performance Products has had one simple mission: Improving the performance of the Great American V-Twin. From humble beginnings as a two-man machine shop, Zipper's has sustained steady growth throughout the years by adding top-notch staff members developing the latest technology into well-engineered parts and engine kits that offer true value through their performance and durability.

Improving the performance of your V-Twin in today's world presents new challenges for the rider. Increased displacement, narrower cam profiles to meet lower emissions and lessening fuel quality are among the challenges that must be overcome to improve performance.

Increasing output while working to improve fuel mileage and stabilizing engine temperature are the main focus of our R&D. New techniques and components are developed, tested and evaluated on a daily basis to bring the rider the most advanced packages available.

Zipper's is the source for many proprietary products such as the ThunderMax EFI module, ThunderMax® throttle bodies, Red Shift® cams, ThunderJet® carburetors, Muscle® engine kits and RaceCase transmissions. Zipper's was the first to offer production CNC-ported cylinder heads, and today we offer the most extensive lineup of CNC heads from Evolution® to Twin Cam®, Sportster® and Buell®. We offer exchange cylinders for Twin Cam® models in 6 different piston configurations. Our Red Shift cam line is available for Twin Cam®, Evolution®, Sportster® and Buell® models. Our Muscle® engine kits are complete kits, engineered with the correct airflow, compression, cam timing and engine management for hassle-free implementation - everything needed to transform your engine to a leading edge performer is included in a single part number.

Our products are available through better dealers world-wide or direct from Zipper's. Please browse our web sites or call us to discuss your performance needs.

www.ZippersPerformance.com
www.Thunder-Max.com

Zipper's Performance Products
6655-A Amberton Drive
Elkridge, MD 21075 USA

Phone 410-579-2828
Fax 410.579-2835
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