I have a Jett 90LX in my Alley Car racer.
This is the most powerful engine in its size money can buy.
Go to our club site and click where it says "On clique ici" and see a video of the Cat with the Jett engine. Turn the sound on and listen to the great sound this engine has.
As the saying goes you get what you pay for.
Here is the link
www.amidair.qc.ca