Ok so I'm looking through the stuff I got spare when I bought the car and I had posted a pic of some headers and piping that I got with the car here about a month or so ago. Someone told me that the set up was a KB kit so my question is there are 2 Y pipes one is 2" and the other is 21/4"-23/8" and the up pipe is 2" and the down pipe is 21/4-23/8" so why would I have 2 different size pipes? Did the kits come that way? All this stuff is brand new never bolted on so I'm confused. Also it looks like the header with the 02 bung will be on the driver side now???