PSI's external adjustment system allows for compression change in minutes and requires no coolant change. This unique design offers stable compression changes from approximately 120 lbs. Most bore diameters will have a range of 10 - 12 cc of volume adjustability. In fact, compression increases torque and horsepower. Torque is acceleration and used extensively in hillclimbing and short acceleration bursts on flat surface.
Horsepower is speed and delivers top end performance.
Integrity, performance, and reliability all in one package and at a cost most high performance snowmobilers can afford and so simple and easy to use. Inc. All Rights Reserved.