Perfect for 3d, precision and sport flying!

It's a fantastic way to ratchet up horsepower for more flying fun! The 120ax, which boasts 20% more displacement than a. 91, can turn bigger props with ease, resulting in improved 3d, precision and sport flying. Boost your plane's performance, without compromising weight — bolt in a 120ax and see the difference for yourself!

with the 120ax, there's no need to buy an expensive aftermarket muffler! The included power box muffler comes with two adapters — one of which turns the muffler 90 ° to become a "pitts style. "