Thinking about replacing my Top Speed Y-pipe w/ a custom made one to quiet down the rasp of my test pipes. I'm thinkin about making one w/ two of these:



I would have them joined to a single 3" to mate w/ my Fujitsubo exhaust.

 

actually I should use 2.25 pipes

 

I've seen test pipes with built in vents so you won't have the rasp you're
refering to. I wouldn't mess with your Fuji Y pipe, you may do more harm
than good!

 

I don't have a Fuji Y-pipe. FYI I have the Titek test pipes. Got them for the additional O2 bung they have.