johnblayz142

i have recently bought a muffler for my prelude, and am gettin straight piping from the header all the way through, i know this will throw a cel, so is it worth it, or should i leavce my stock cat in(hallowed out) so it still has the o2 sensor plug in, to avoid throwing a cel????
let me know what i should do????
thanks yall,
Garrik

ForTehNguyen

exhaust might sound raspy and sound like an old domestic car, all back firing, etc

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MugenPoweredLude

just get a testpipe with an O2 bung welded in and the same size as the piping job your getting

you can get the test pipes at:

Test Pipes

Oh yea, welcome to PO

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2005 EVO VIII-SOLD/R.I.P.
2000 Honda Prelude SH - Gone But Not Forgotten

axion68

And the real kicker is that you should still throw a code with a hollowed out cat converter. However you can still do the OBDII workaround to eliminate the code. I personally don't think it is worth it as a daily driver, I mean your exhaust will be a lot louder and raspy.

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CTPRELUDE

I'm not positive, but I think you will still throw a cel even with the O2 bung welded in for a non functioning cat or something like that. I'll let you know when mine arrives this week.

johnblayz142

alright thanks yall for all your help, i think im jsut gonna use my stock cat, with the straihgt piping mn muffler for awhile, then get a test pipe with the 02 sensor plug in, thanks
garrik

bolivianfuego

Im running a test pipe on the street, if you learn how to control the throttle, you'll be fine. At high rpms that baby sings. Good luck.

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axion68

I just ordered a carsound cat from testpipes.com for $100, direct bolton replacement. It is a better option for $50 IMO, you may not get quite as much power but your car will be quiter and will be better for a daily driver.

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johnblayz142

thanks for all your help, later yall gotta go paint the housing on the headlights..........
garrik

NotoriouSH

I took my testpipe off for the following reasons:

1) extremely loud (VTEC sounded amazing though)
2) made the car vibrate at idle
3) lots of black soot on the bumper
4) loss of low end torque

With the cat back on, my exhaust system sounds smooth and deep (improvement), idles without vibration, and my back bumper doesn't get as dirty. However I do have a lower top speed (about 150 mph versus more than 150), slightly worse gas mileage, and a lot less peak horsepower. I do appreciate the extra torque though, driving around town is much more enjoyable.

It's up to you, if you like to race then you'll want the testpipe. If the car is your daily driver with occasional street racing then it's probably not worth it.