Mugen has the best clutch setup in the business, in my opinion. I like their carbon black clutch shoes with the 1.0 springs with most every engine, but the p5 has so much torque the alluminum shoes are overkill. the carbon shoes last forever and don't eat into the clutch bell and overheat the springs like the all ones do...Just try it, and you will see. I use the mugen shoes on every car and clutch setup with kyosho 1.0 springs, but if you have a mugen setup use all mugen stuff....