There is one or two topics mentioning the Varex muffler, but they're a few years old and i have a few questions;
1. I read somewhere that straight through mufflers sound doggy with extractors fitted to the engine. Does anyone know about this, agree or disagree?
2. With the 3" muffler, would I be losing any power from backpressure problems?
(the engines a CA20 so it has less power than the TRX 2.4L as well) Lots of people have lots of different (we'll call them theories) to backpressure, and what the go is, with it.
Lastly, the extractors I have at the moment (unfitted) are 4>2>1, the exhaust pipe end in a what I'm assuming is a 2" diameter. Will this be a problem if I'm planning a 2.25" Extrac-Muffler system?