I am building the TF Piper Arrow. I purchased the Tower Hobbies .61 engine along with the muffler that they recommend. I have follow the kit instructioins to the T. There is no way that the muffler that they recommend is going to fit and remain inside of the cowling. Unfortunately the TF muffler that mounts on the firewall will not fit the Towers engine. The other muffler that they are offering is the Bisson. There is not enought room under the engine and the nose gear mount for the muffler to fit. Do you have any suggestions?
Thanks
chopper man

Call The Kit And Engine Comapny And Ask Them What To Suggest.
Good Luck

Aftr spending 2 hours on the phone with tower hobbies, it has been determined that the tower's engine and the muffler that they suggest will not fit in that configuration. Tower's customer service was great and I have a OS Max on the way with the Top Flite in cowl muffler. It should work now.
chopper man