New from HPI Racing is this Nitro Racing Clutch for Nitro RS4 cars and most 1/10th scale nitro touring cars. The clutch has three adjustment holes so racers can choose the best setting for high- or low-traction racing surfaces, and change the range of RPMs that the clutch engages the clutchbell gear. The spring supplied with the Nitro Racing Clutch is a loop style spring for smooth transfer of power, and the clutch material and design help prevent melting under the stress and heat of high-power Nitro engines. It’s light weight for more punch, quick throttle response and excellent overall performance.