Hey guys, i started off with a tanabe Y-back exhaust, with an HR Y pipe, and stock cats. I had a little rasp and I think it was coming from the HR Y pipe.

I installed my FI resonated tested pipes on sunday, and now i've got some serious serious rasp. I think its due to the fact that the outlets of my test pipes are 2.5, and the inlets of my Y pipe are 1.75" - 2". I also think there could be a leak somewhere.

I think im going to purchase a new Y pipe, but i need some input after i have spent the past 3 days searching this. I need a Y pipe that matches my test pipe outlets - 2.5" but the inlet of my tanabe is 2.75. Do i go with a 3" Y outlet, or a 2.5" outlet?

Im trying to get the least rasp, least turbulence possible. Let me know what you guys think. Thanks!

 

xyz pipe is 2.5"

 

also you want the exhaust to steadly go up in diameter not changing thruout, thats what is making your rasp.

 

At that point, I'd rather get the exhaustdepot, or tanabe Y pipe

That's what I thought. So, i should NOT have a Y pipe with an outlet of greater than 2.75, as my tanabe midpipe inlet is 2.75...