High performance clutch bell with patented R-Vent system for more air suction above the clutch, preventing wear and friction loss. Lower operating temperatures and excellent traction. Low weight means better acceleration. Excellent value for money in the high-end sector and a must for any modified transmission. For an excellent independent review of the clutch bell see: http://www.tuningmatters.com/reviews/clutches-and-clutch-bells/review-naraku-v-2-cnc-clutch-bell