Kyosho Sirio was first to release the hugely popular S18TX for the TMaxx years ago and now they have upped the ante one more time with the release fo the S27RE and S27 TX. 4.5cc of tire smoking power is now available for your Revo or TMaxx. Both engines are direct bolt-ins to their respective cars. The engines feature ABC 3 port piston and sleeves for amazing performance and all the Sirio quality and engineering you come to expect from an engine line that has won three consecutive World Championships.