Might be selling my Tsudo N1 style catback exhaust system here shortly. It is the true 3" all the way back, and has the reducer down to 2.5"at the cat flange to bolt up to the OE cat converter. This was last year only for about 1500 miles, thats all the car was driven last year. I am going to be selling because I will be making my own exhaust system for my car in a couple of months. This is fully polished stainless steel as well. I will let it go for $100 plus shipping.