"Poor man's sport muffler"
Did simply muffler modification.
- opened muffler (if I knew how it looks inside, you do not need to open other area except "new Y-tube")
- cut restrictive part out (point where single inlet transforms to two smaller pipes)
- installed Y-pipe (ordinary extension to modify exit)
- removed twin exit and installed bigger single tube
This resulted nice sound muffler, I have no clue if it helps in power gain. But cost me some $30 to do
