Hey guys I posted this in another section but didn't get many replies so I thought more people would see it here. Sorry if your reading this twice. I was thinking about getting a Y-Pipe installed this weekend but not changing out my exhaust. My question is will my car pretty much sound the same with the stock exhaust and just the Fuji Y-Pipe or will it sound different? Anybody have this set up and can comment on it? Is installing the Y-Pipe to my stock exhaust a good fit? Finally I've seen a few people say that the Y-Pipe is more restrictive to air flow then the exhaust is and it might actually increase torque. Now I'm not sure as far as the more restrictive part goes but I don't see how it can increase tq but any help on the subject would be much appreciated. Thanks in advance guys

 

it might help for a bit .. but not much.
With regards to which part of the exhaust is the most restrictive, the answer that you are going to get will be all over the place..

Yet, from what I have heard/seen/experienced, it would be rated like this:

Cats > Y-Pipe > Header.. the other parts shouldn't be too restrictive at all

Cheers