2 1/4 pipe

[that1bmxguy]

how much of a difference would 2 1/4 pipeing from the cat back make to a stock motor?

[Direthought]

I beleive thats what we have stock, or at least what is put on after the stock rusts thru.

[h22sparkle]

no i think we have just 2.00 or 1.75 im thinkin 1.75

[blackice]

When i got my old accord's exhaust replaced they told me the stock piping was 1 7/8. I would recommend the 2.25 but definately get a resonator put on right after the cat, otherwise it is extremely loud. On the top end your HP will improve slightly with an upgraded midpipe. Also would you be doing this and keeping the stock muffler? Concerning the myth about exhaust backpressure and upgraded piping that I'm sure you will be hearing about; http://www.cb7tuner.com/vbb/showthre...t=backpressure
Fearit22 explained it well about halfway down the page.
Hope that helps you out.

[wrichards2005]

You're not gonna get much performance increase without an intake and muffler. If you get those two things, in addition to the muffler, you could probably get 8-15 hp.

[xtr91accord]

stock we got 1.75...but i got a custom mandrel bent system with 2.25, with a header and intake..gave me about a 6-8 HP increase (auto)

[accrdpower]

common upgraded sizes are 2-2.5in for N/A and 2.5minimum-3+ on turbo'd cars.....u'll notice a difference in sound and power

[that1bmxguy]

yea i already have a muffler. i jsut have stock pipe and i dont think its doing much good with jsut the muffler and stock pipe.

[93accordexcoupe]

You're not gonna get much performance increase without an intake and muffler. If you get those two things, in addition to the muffler, you could probably get 8-15 hp.

intake and muffler got u that much huh?

[accrdpower]

well with header/intake/2.5in exhaust, a high flowing cat (ex: Random), and a good straight through "muffler" 15 or so hp can be gained depending on several aspects. low end torque will suffer some, i mean like very little.
the dc sports header claims 12-15hp alone, muffler=1-2hp, 2.5in exhuast maybe 2hp, high flow cat= another 1-3hp. so around 15-20 when all said and done. just my guess...plz jump in u exhaust genious's

[93accordexcoupe]

strait thru mufflers will give you no gains. mufflers like mugen twin loops and rs*r's are a different story

[KoNEY]

I'm running 2.5" straightpipe. Starts at o2 housing with 2.5'', then a 2.75'' flexpipe (new), followed by 2.5'' all the way back to the "muffler", sounds awesome (I'll post a vid) and flows very well, not restrictive at all...

[accrdpower]

strait thru mufflers will give you no gains. mufflers like mugen twin loops and rs*r's are a different story

hmmm might wanna rethink that statement......
will give u more gains than mufflers like magnaflow or something with baffles......common sense in a can....