Race Camshaft with great all around peformance througout the RPM range yet not so agressive that you have to replace your stock valve springs to run it. Similar to others on the market but without the high price and no core exchange (this is not a used re-ground cam). This cam is for the Chinese engines that do not use a Honda type Camshaft (fits most 124cc engines with a 52.4x57mm bore and stroke and most 2 valve 86cc through 107cc engines with E22 heads or similar) Common models are Pitster,GPX, Xtreme, Thumpstar and most Jailing engines. Size: 35mm large bearing, 32mm small bearing, Approx 68.30mm center to center.