This is a Traxxas Revo Big Block Installation Kit. This fits the Revo 2.5 and 3.3. This kit allows Revo owners the option of installing various .21-.28 size engines.
The Revo big block installation kit makes it easy to bolt primal big block engine torque into the high-tech Revo. Just imagine having the most suspension travel available in any monster truck, combined with the big block engine of your choice. No matter which big block you choose, Revo’s low center of gravity, lightweight, and efficient drivetrain means you’ll get the most performance out of every ounce of horsepower you put in. The big block installation kit includes all the components and hardware necessary for a factory engineered, quality installation.
Engines that will work with no modifications are O.S. .21 VZ-B, Team Orion WASP .28, and the Dynamite Mach .26. All components required to install a big block engine in your Traxxas Revo model should be included. This includes a forward only conversion kit, a universal engine mount, a manifold with gasket and spring, a flywheel and clutch nut, a forward only shaft, and miscellaneous hardware required for installation.
Engines that are known to work with no modifications are O.S. .21 VZ-B, Team Orion WASP .28, and the Dynamite Mach .26
The following engines are known to work with some modification: Nova Rossi 528, Nova Rossi .21 P-5, Picco .21 Maxx, Sirio S23TX, Sirio S27, and Team Orion Wasp .26
The following engines are known to not work with this conversion: Thunder Tiger Magnum Pro 21, Associated Pro 21R, O.S. .21 RG, and O.S. .21 RZ