2.25" or 2.5" ?

[MitchFong]

Exhaust is about to kick the bucket, so thinking about getting a new custom exhaust made for spring.
Thinking about having a y pipe before cat then strait pipe to new muffler.
Just wondering now if i should go 2.25" or 2.5"? Motor is stock with an intakeand chip, so not like im making any amount of power. So i was thinking 2.5" may be overkill and i dont want it to be outrageously loud. I just want a nice mellow tone. so what do you guys think? 2.25" enough or should i go 2.5"?

[MrK]

if it's a single exhaust, definitely go 2.5". Reap the full benefits of drastically reduced backpressure without going so big (3.0) that the velocity suffers. I'm gonna go single 2.5" soon myself.

[Insanity]

2.5" is definitely not overkill.

[Gus]

2.25...i found with 2.5 i had a lot less midrange than a friend did with 2.25. you're call

[MR 325]

I'll go ahead and reccomend 2.5"

That's what I ran on my NA 2.5L

[bimmers4life]

with no resonator that thing is gonna be pretty load eh?

[MR 325]

with no resonator that thing is gonna be pretty load eh?

Without either a cat or a resonator I'd say it will be pretty loud, yup :)

[MitchFong]

well i plan on having a cat or a resonator in there. I just dont want it to be to loud, i have a work term in edmonton this summer and 5 days driving across Canada in a "race car" lol, will not be fun i dont say.. It will be a single pipe, so i was kind aleaning towards 2.5" till my buddy threw a 2.25" on his jetta gli with headers, and i loved the sound. I know a 4 banger will be different, but it was so clean. So many a 2.5" on a I6 will achieve the same level of sound?
Ill have to ask the muffler shop when i go next week. Damn decisions, i always manage to make the bad call..