We achieved this by redesigning the famous Mega-G chassis, designing a new power unit and precisely mating it to the upgraded AFX120 controller and exclusive Tri-Power Pack. With decades of slot car innovation and over a year of experimentation behind it, we believe the Mega G+ Race System is the best out-of-the-box slot car system you can buy. Mega G+ Chassis This chassis is the heart of the Mega G+ Race System. It is not just faster and better handling than the competition, now it is even smoother, more consistent, more intuitive, and more fun to drive than any car we’ve ever built. Check out these performance features: FN20 Advanced Power Unit: Same power output as original Mega-G but lighter, smoother, quieter, more consistent and uses 33% less energy Weight: Up to 30% lighter than any other HO chassis, 5% lighter than original Mega-G - Way more fun to drive Size: Lowest and narrowest chassis ever made - Much more real