straight pipe?

[riff22]

i have a 95 tsi i just got a 2.5 downpipe no cat, i want to run straight pipe the rest of the way back. my question is what are the other 2 resignators and an 02 sensor for? are they needed? and there will be no muffler just 2.5 inch pipe all the way back will this be to loud?
thanks

[joemathews]

Without any kind of muffler, yes, it will be very loud. The purpose of resonators and mufflers is to dampen sound and allow the exhaust to collect in larger areas so it isn't flowing so quickly through a small opening. It will be very loud with no sort of muffler.

As far as necessity, there is no major function other than to dampen sound. The absence of the rear o2 will trip a CEL though (but won't cause performance loss or problems), so if that is a huge problem for you, don't do it.

I would encourage you to do straight pipe back to a cheap ebay N1 or dual tip muffler. If you wish to avoid police pulling you over for your exhaust being too loud, this is the route to take.

[riff22]

i might sound stupid but what is trip a cell mean?

[JoeWagon]

If you disconnect the rear o2 sensor, the ECU will turn on your Check Engine Light. CEL.

[joemathews]

Sorry...damn forum abbrevitations have me brainwashed. Thanks Joe.

[riff22]

lol oh thanks

[riff22]

can i just put it in the new pipe?

[BoostedSpyder]

i have mine on a bung in my 3'' exhaust with no CEL. it is there so that the ECU will know when your cat converter is bad. oh i got no cat, i got a cat-eliminator DP

[95_GSX]

I just pulled my o2 and wrapped it in tin-foil then ziptied it up out of the way under the car. never threw a CEL.

[macder]

Keep in mind if you run a straight pipe you have eliminated all emission law (vary from state to state) components and may get you car impounded if a cop looks underneath. I live in Toronto and a friend with a '99 mustang gt ran straight pipes, got pulled over for noise pollution, the cop looked underneath his car to notice its a straight pipe, now his car is impounded 2 years. Dont know much bout emision laws in the states, but in canada this is a big no no unless your vehichle is a 1979 or previous

[EclipseRST]

i love not having emissions here in Minnesota!

[ashah000]

Canada must suck for moddin cars, dont they give you tickets even if the car is lowered an inch, and BS like that.
No emissions here in MI either

[george536]

i hate emissions here in cali. u cant do nothing, and we have low octane gas.

[helliviknow]

i have to echeck in ky.. but its only once each two years i believe and i just echecked in august.. so if i put a test pipe on id just have to save my cat so i can throw it back in b 4 next echeck

but yeah i think if i get pulled over and they find no cat its a fine here.. not sure imma hafta look into it

[macder]

no you cant get a ticket for lowering your car in Canada, at least not in Ontario