RE: RCFG factory exaust fit problem
If you have good air flow over the engine you can remove all the fins in the back and not hurt the cooling. I just looked at their engines and I think you'll also have to find a way to support the muffler other then at the engine. That's a lot of mass for two small bolts to hold. If you don't the vibration will loosen the muffler. You'll never keep it tight. Dennis