Absolutly!
3d and a tuned pipe. Hello?
Many people mistake muffler pipes for tuned pipes.
The latter has no place on a 3d aeroplane that spends most of its time a low to medium RPM.
Thus off the pipe...thus being pointless.
85% of the folks running a tuned pipe on an aeroplane aren't running a "tuned pipe" at all.
Sure it's a pipe...but it aint tuned!
For that you'll be needin' some serious header cutting untill you reach the tuned point at full throttle.
Then the engine is basically useless at any setting other than full bore.
Unless you're into racing or retro 70s balistic pattern flying...stay away.