Straight pipes w/ out engine light ?

[msediqi]

hey guys i took my 03 boxster non S to several muffler shops to try and take out the resignators and have straight pipes put in to make the noise of the exhaust louder. Every muffler shop i went to were not sure if i had 4 cat converters or 2 cats and 2 resignators, and if they are 2 resignators and they take it out they are worried that the check engine light will be on without the resignators. My question is is it 4 cats or 2 cats and 2 resignators ? are the resignators removeable? will the check engine light come on if i remove the resignators? will the exhaust get louder if i remove the resignatos? Thanks guys!

[Guest]

Excuse my ignorance. What is a resignator?

You have 4 cats, but 2 are enough if you move the oxygen sensore before and after the remaining cats. See my other post.

Edited October 17, 2009 by sergiu

[Cloudsurfer]

First off, what you are talking about is a "resonator," not a "resignator." A resonator is an acoustic device used in some exhaust systems to help tune the sound. The Boxster (any and all of them, whether 986 or 987, S or non-S) does not utilize these.

Your 03 car has two pre cats in the headers, and then two cats in the midpipes. You can remove the second set of cats without running into check engine light problems as the second set of O2 sensors are after the pre cat, but before the midpipe cats. If you want to run aftermarket headers, that are non catted, you will have to find someone to flash your car's DME to RoW (non North America) software, as the RoW program does not monitor the second set of O2s. If you install non catted headers without doing this you are guaranteed to get a check engine light for catalyst efficiency. The other option is to run aftermarket, catted headers.

[Guest]

Agree with row if you want the maximum noise and power, the other solution is also to get the cheap eBay headers and the nhp midpipes with sportcats and move the o2 sensors before and after those. With that and the stock mufler with previous Pedro's mod I have more noise that I like on the 3.6 - also desnorkled and with k&n.

Sergiu

Edited October 17, 2009 by sergiu

[msediqi]

oh sorry resinator...ok so i was looking at the ebay headers you are talking aboit on ebay that run about 80 bucks so i will need that, what is the nhp midpipes ? can you link me to that? i have de-snorkled also but i had K&N filters are not good for the boxsters ? thanks sergiu and cloudsurfer for your help, i can be a little difficult sometimes lol... u guys are great :) btw sergiu how much more power do u feel with a 3.6 in ur boxster?

[mcmike27]

Here's a solution my wifes Uncle had done on his 98 986. The local Porsche dealership took off the stock muffler cut the top open and removed the resonater in the muffler assem. They then rewelded the top back on and it sounds nice and runs perfectly. The only 'issue' we have with the car is between 2300 rpm and 2900 rpm when the engine is cold it is a bit 'growly'. Once the engine warms up and the timing adjusts to the warm engine it sounds nice. Lets just say you 'hear' the car a bit before you see the car. Our local Porsche dealership loves the way it sounds and comments each time we take in for the annual service that it sets it apart from the stock whooooshhh sound the stock muffler makes.

Just a suggestion if you dont want to spend additional monies on a muffler.

Have fun

m2

[Guest]

NHP midpipes link http://www.maxspeed-motorsports.com/986nhpcatpipes.html

The power is amazing . No question faster than a 996.

The K&n is fine with the new stile MAF- more resistant for dirt.

Sergiu

[msediqi]

thanks guys! sergiu did u really beat an evo and sti????

[Guest]

thanks guys! sergiu did u really beat an evo and sti????

sure - more torque, more power, less weight, not moving 4 wheels at the time, no turbo lag or at least to compensate the tiptronic- "there is no substitute" -;)

For sure all the sti's and evos will try to prove that an expensive porsche it's slower than their econobox.

Sergiu

Edited October 17, 2009 by sergiu

[yuyokatana]

First off, what you are talking about is a "resonator," not a "resignator." A resonator is an acoustic device used in some exhaust systems to help tune the sound. The Boxster (any and all of them, whether 986 or 987, S or non-S) does not utilize these.

Your 03 car has two pre cats in the headers, and then two cats in the midpipes. You can remove the second set of cats without running into check engine light problems as the second set of O2 sensors are after the pre cat, but before the midpipe cats. If you want to run aftermarket headers, that are non catted, you will have to find someone to flash your car's DME to RoW (non North America) software, as the RoW program does not monitor the second set of O2s. If you install non catted headers without doing this you are guaranteed to get a check engine light for catalyst efficiency. The other option is to run aftermarket, catted headers.

Hello and thank you

So how about if I use non catted headers, but they have holes for both O2 sensors/ Do I still need to flash my DME???

[yuyokatana]

First off, what you are talking about is a "resonator," not a "resignator." A resonator is an acoustic device used in some exhaust systems to help tune the sound. The Boxster (any and all of them, whether 986 or 987, S or non-S) does not utilize these.

Your 03 car has two pre cats in the headers, and then two cats in the midpipes. You can remove the second set of cats without running into check engine light problems as the second set of O2 sensors are after the pre cat, but before the midpipe cats. If you want to run aftermarket headers, that are non catted, you will have to find someone to flash your car's DME to RoW (non North America) software, as the RoW program does not monitor the second set of O2s. If you install non catted headers without doing this you are guaranteed to get a check engine light for catalyst efficiency. The other option is to run aftermarket, catted headers.

Hi, how about if the non catted headers have 2 holes for both 02 sensors? Will I still need to flash the computer? Or will I get a CEL light?? Thank You

[Guest]

First off, what you are talking about is a "resonator," not a "resignator." A resonator is an acoustic device used in some exhaust systems to help tune the sound. The Boxster (any and all of them, whether 986 or 987, S or non-S) does not utilize these.

Your 03 car has two pre cats in the headers, and then two cats in the midpipes. You can remove the second set of cats without running into check engine light problems as the second set of O2 sensors are after the pre cat, but before the midpipe cats. If you want to run aftermarket headers, that are non catted, you will have to find someone to flash your car's DME to RoW (non North America) software, as the RoW program does not monitor the second set of O2s. If you install non catted headers without doing this you are guaranteed to get a check engine light for catalyst efficiency. The other option is to run aftermarket, catted headers.

Hi, how about if the non catted headers have 2 holes for both 02 sensors? Will I still need to flash the computer? Or will I get a CEL light?? Thank You

yes. Yes