O.S. GT33 with Tuned Silencer 

I love that exhaust muffler, love it

It is a Xoar 18x8 PJA Beechwood Propeller. It was the break-in prop to approximately simulate in-air performance of an 18x10. The header was made for an Evo 26GT/GX, and required opening the bolt holes to 5mm toward the center for a 1.34" spacing. Just the pipe (tuned silencer) as it came from Horizon. Macs Products (macspro) has a DLE-30/GT-33 header now (4210/4211/4212) and it is more open with a .875" pipe. It should perform even better with a full tuned pipe. I'm getting them to find out.

If you are building a speed model, the pipe would be great. For aerobatics, freestyle etc, the supplied muffler or cans would maintain your mid-range. I'm seldom at full power for any extended period of time - but in racing I'm sure it would be wide open.

that engine and pipe would look nice on the new pheonix strega

WOW ...WHAT SPEED DO YOU ACHIEVE WITH 18 X 10 @ 8600....MY MATH SAYS LESS THAN 80 MPH....

What kind of and size prop? That's impressive for a simple exhaust change. What did you modify on the exhaust system?

What maker prop and size? What did you modify on the exhaust system? That's impressive for just s exhaust change, thanks

from where I can buy this Silencer