2.5 or 3 inch exhaust?

[cb7-tcakes]

Going to get exhaust done at a friends shop, i want to go 3 inch piping but ive heard that its really not necessary unless you have turbo. Will it be better for me to get 2.5 inch or is 3 inch going to give me more performance?

[CBkid93]

ya theres no need for 3'' unless ur running turbo or you fully built 2.5'' is fine if ur going 3'' ur loosing power not gaining id say 2.25 would be the best or just a full catback exhaust

[93.4dr.22A1]

2.5 is still unnecesary IMO unless you have alot of mods. and not to mention that the exhaust manifold/headers out there are around a 1.75-2 in collector

[mndude07]

2.25" is about the ideal size for a stock f22a or with full bolt-ons. The only problem is, as soon as you throw in a cam, or swap to a H22, then you get closer to needing 2.5", so think about your engine plans, and then decide based on that.

Another compromise is to get an exhaust slightly smaller that what you'll need later, and just have a dump valve welded in.

[cb7-tcakes]

ya theres no need for 3'' unless ur running turbo or you fully built 2.5'' is fine if ur going 3'' ur loosing power not gaining id say 2.25 would be the best or just a full catback exhaust

As i thought, my friends shop does custom work, but if i remember right i think they only had like 2.5 or 3 on hand and they going to make me a header. Ill check again but ill go 2.5 then. Im looking to have a decently sounding exhaust, they offer a magnaflow muffler but i was thinking of buying an apexi one, any opinions?

[cb7-tcakes]

2.25" is about the ideal size for a stock f22a or with full bolt-ons. The only problem is, as soon as you throw in a cam, or swap to a H22, then you get closer to needing 2.5", so think about your engine plans, and then decide based on that.

Another compromise is to get an exhaust slightly smaller that what you'll need later, and just have a dump valve welded in.

H22 swap in progress so i think 2.5 will be good choice , ive got some slight mods but plan to upgrade more next winter.

[mndude07]

H22 swap in progress so i think 2.5 will be good choice , ive got some slight mods but plan to upgrade more next winter.

2.5 will be good in that case then. Have a 2.5" collector and a high-flow 2.5" in/out cat put into your system too and you'll see better gains.

[cb7-tcakes]

sweet thanks, just passes emissoins couple months ago too so i wont have to worry about that till next year i think

[MMAmonk]

Like everyone else mention the engine is originally designed to run on 2 1/4 but the power loss by going to 2 1/2 will be hardly noticeable and 2 1/2 will be good even for a basic turbo set up. That's what I would go with.

[FDAccord]

If you're going to go with an H22 and have plans to do a bit of work a 3" exhaust will see gains. You don't need turbo to see gains from a 3" exhaust on an h22.

[Teddy]

i just got this cat back 2.5 good welds got it in 5days $102.00
http://cgi.ebay.com/ebaymotors/90-91...rQ5fParts.then
here is a muffler if its to noisy for you
http://cgi.ebay.com/ebaymotors/Muffl...item5885b1d80d
i`m going to put the cat back on today i got it yesterday

[carps_accord]

honestly for the price...a thrush oval chamber muffler is great..cost's about $40 and sounds much better then magnaflow, has a nice low growl to it with out the raspiness

[cb7-tcakes]

i just got this cat back 2.5 good welds got it in 5days $102.00
http://cgi.ebay.com/ebaymotors/90-91...rQ5fParts.then
here is a muffler if its to noisy for you
http://cgi.ebay.com/ebaymotors/Muffl...item5885b1d80d
i`m going to put the cat back on today i got it yesterday

think you could upload a video or a sound recording of how it sounds when you get it installed?

[MafiaCB72010]

2.5

You should be good 2.5 cauze i have it done to my 92 EX coupe and it dose good for turbo as well up to 16psi

[gloryaccordy]

2.25 is too small

Maybe for a stock stock stock F22A... but if dude does any kind of meaningful upgrades (H22, F22 cam, H23 IM) a 2.25 will choke him down more than a 2.5. A 2.5 has 20% more area than a 2.25.