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Engine dyno and Track dyno tested
2004-2008 Arctic Cat 90 2x4 4-Stroke
2011-2012 Victory Zach Ness Vegas
1989-1993 Arctic Cat Wildcat Mountain Cat
use Biker's Choice axles
Epi PATV13 Primary Drive Clutch Spring - Silver electrical-batteries-components Engine dyno and Track dyno2 1 2in. Load: 50lbs. 2 1 4in. Load: 71lbs. 1 1 4in. 155lbs.. Largest selection of springs to tune from. Designed from the highest quality material. All EPI springs manufactured using a 5% tolerance which is the lowest in the industry. ISO 9000 Certified. Designed for extended life in demanding applications. 40% lighter. Resist fading due to high heat conditions. Highest quality, most durable material available today for clutch springs. Fine tune your
