Alright I have asked around but have gotten different answers. What size is the piping on the N1 dual? What size is the single part that would connect to my midpipe and what size are the 2 parts that split from that part and go into each muffler? Thanks.

 

bump

 

I have the N1 dual and 3inch from the turbo to the N1 Y pipe.

 

So is the single part(that would bolt to a MP) of the N1 Y-pipe 3" or what? What about the 2 pieces that go into the mufflers, do you know what size those are? Thanks.

 

The Apexi NI dual goes from 2.6inches to a little more than three. The 2.5 inches starts in the single piece then it starts to expand slowly, thats why people like that exaust so much. It work towards good flow characteristics.

 

I think whether or not it bolts up to a 3" midpipe depends on the brand of the MP. I have heard that it won't bolt to a RB MP.

 

I thought it was 3 inch into two 2.5 inch pipes.

 

See everyone is misinformed. So it is a little over 2.5" where it would bolt to a midpipe? Hmm...I guess I might be making my own catback then.