Gene, my 1.40 RCS is a 22cc but rear induction and high performance, no longer made or imported. My Brison 2.4 is a 40cc and gives about the same performance as the DA 50, also no longer made that I know of. The DLE 55 is a super buy. If you know any group of guys that get together and order from Hobby King and pay for the express shipping the price of the DLE is even cheaper from them. It's an outstanding engine for the price. Just toss the spark plugs that come with any of them and they are perfect out of the box.