REDS Racing M5 GT engine features: new VX2 carburetor; silicon filled and tuned crankshaft; sleeve with 5 inlet ports and 3 exhaust ports; high performance made in Japan front ball bearing; rear steel bearing made in Switzerland.REDS Racing M5 GT Ceramic engine features: new VX2 carburetor; silicon filled and tuned crankshaft; sleeve with 5 inlet ports and 3 exhaust ports; high performance made in Japan front ball bearing; rear Ceramic bearing made in Switzerland.