2.25 cat-back system?

[Lyger]

I want to stay with with NA KA engine. I want to know if there is any 2.25 cat-back systems out there for the S14. It seems like all the cat-back system for the 240's are 2.5 piping or higher. I hope I'm wrong, but any info would be much appreciated.

[Matt240SE]

Ideally 2.5 inch piping is what is best for our cars, well If i have read my articles and magazines correctly.

[tnord]

actually.........i think slightly under 2.5 is best, but hey, who's counting? either way i agree that 2.5 is better than 2.25. if you're concerned about being too loud, there are plenty of systems out there that don't make a bunch of noise.