The “Ielasi tuned” Sonic V.21T is the top of the line version of the 3.5cc on-road engine hand-modified by former World and European Champion Daniele Ielasi. Years of experience and a great passion for nitro racing allow the Sonic factory driver to make a good product even better. The crankshaft has an more aggressive timing for an improved performance while maintaining a very efficient fuel consumption realized by an optimized fuel flow. Special tear-drop work at the sleeve improves the fuel flow furthermore helping to reduce inner turbulence. Additionally the V.21T-IT is equipped with a high performance Swiss ceramic main bearing.