A Nelson Ultra Thrust or Jett Stream (Jettstream? ) muffler are a great bang for the buck, no doubt about it...and they are without the hassles of a full length tuned pipe. My modded Webra .50 runs better than great w/ one.


Put a Tower/Aquacraft (same as GMS ) muffler that cost 15 bucks on your TT or O.S. or Evo / Magnum .46 or .52 / .55 and you'll get a nice gain, and still have throttlability...even better bang for the buck, for those engines.


The way I look at it...work with what you already have...try an experiment or two...no big deal...if you mess it up, you're not out several hundred dollars, and you learned something in the process.
If you did it right, there's the satisfaction in knowing that you did it yourself, and it's hard to put a price on that.

The Evo .60 is new...we will see if the crank pins hold up...
We had 2 Evo .52's in our clubs loose theirs...sheared off flush...
We will see if the metalurgy has been improved, aye!

Like I said, the way I look at it...it's a cheap (relatively ) Chinese engine...not an irreplacable, not to be seen again collectors item...