Spotlight: O.S. 21TM R/C Engine w/Revo Manifold
http://www.osengines.com Boost the 4WD performance power in your Traxxas® Revo® or T-Maxx™ with the 21TM engine from O.S.! It's the perfect upgrade for either monster masher -- because both versions of the 21TM are a direct fit for Traxxas EZ-Start® or pull-start systems, as are the manifold and clutch assembly!