Should I go with 2.25" or 2.5" exhaust tomorrow?

[Split]

i dont think 2.5 will hurt performance, but i highly doubt you'd gain anything from it. 2.25" should be a bit quieter as an added benefit if that's what you prefer.

[Little Blue]

Originally Posted by Split

i dont think 2.5 will hurt performance, but i highly doubt you'd gain anything from it. 2.25" should be a bit quieter as an added benefit if that's what you prefer.

2.25 will be louder, 2" will be the loudest and make more power. In this small of an engine 2" is plenty. The hotter the exhaust the faster it will flow. I put header back 2" exhaust on a 2005 civic dyno'ed it than put on a 2.5" system and lost 8 hp on the dyno. I went back to 2" and dyno'ed it and gained back my 8 hp. The 2" system was louder using the same brand exhaust. My 2cents.