** All TAPP Arctic Cat 998 Clutches require a replacement Clutch Bolt and Washer that replaces the stock bolt and washer. Bolt & Washer is included with your AC988 purchase **
3000 - 3500 Engagement - Blue Spring 100/190
3500 - 4500 Engagement - Black Spring 140/210
240 hp or Lower - 1mm Rollers
240 hp or Higher - 2 mm Rollers
*By flipping 2 Ramps from A side to B side you will increase your Engagement by about 600-800 RPM
*By flipping all 4 Ramps to B side you can increase your Engagement RPM even higher
