10-13-2008, 07:09 PM
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#1
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Registered User
Join Date: Sep 2006
Location: California
Posts: 713
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You can go with some cat-bypass pipes. The CEL that comes on due to the O2 sensors won't affect your car's performance... It will just simply be on to alert you... Some people that get them on due to the bypass pipes or headers that remove cats just take the bulb out of the instrument cluster that goes to the CEL
P.S. I have a brand new set of Stebro racing cat bypass pipes if you're interested...
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Some stuff for sale: M030 S 24mm front sway bar, M030 base 19.6mm rear sway bar, 996 GT3 OEM Porsche Motorsport front strut mounts monoball "camber plates"
WTB: looking for some 5-7mm spacers with extended bolts
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10-13-2008, 07:49 PM
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#2
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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awesome, just the answer i was looking for...i dont really care for the light so thats not a problem.
i may just do this mod this weekend, might give the new exhaust a better note.
just curious, how much do bypass pipes go for these days?
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"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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10-13-2008, 08:49 PM
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#3
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Registered User
Join Date: Sep 2006
Location: California
Posts: 713
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Quote:
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Originally Posted by djomlas
awesome, just the answer i was looking for...i dont really care for the light so thats not a problem.
i may just do this mod this weekend, might give the new exhaust a better note.
just curious, how much do bypass pipes go for these days?
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The Fabspeed bypass pipes go for $495/set http://www.fabspeed.com/Boxster.html
The Maxspeed/NHP are on sale for $499.99/set
http://www.maxspeed-motorsports.com/986nhpmidpipes.html
I'll PM you on the set that I have...
__________________
http://farm4.static.flickr.com/3420/...90927559_o.jpg
Some stuff for sale: M030 S 24mm front sway bar, M030 base 19.6mm rear sway bar, 996 GT3 OEM Porsche Motorsport front strut mounts monoball "camber plates"
WTB: looking for some 5-7mm spacers with extended bolts
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10-13-2008, 10:04 PM
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#4
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Registered User
Join Date: Jan 2007
Location: Depends on the day of the week....
Posts: 1,400
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There will be zero gain to be had by removing the cats unless you are also upgrading the headers to some that flow well. The rear muffler isn't actually that restrictive, but the factory headers are horrible.
As to CELs, you will get a catalyst inefficiency error due to the lack of difference in pre and post cat O2 readings. You can either flash your DME to RoW program with a PST2 (which ignores the secondary O2s), or you can try locating the secondary O2s after a spark plug defouler, which may work.
Patrick
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10-14-2008, 04:04 AM
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#5
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07 Carrera S Cab
Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
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This may not matter in your state, but if Illinois does require state inspections, wouldn't the CEL trigger prevent you from passing any inspections? Here in NY/NJ, if you have a CEL light, and then try to mask it by disconnecting your battery and resetting the light, you still won't pass the inspection because your readiness codes will not have reset until you drive a certain amount of drive cycles, and by then, your CEL would reappear. Just curious.
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Current: 07 Carrera S Cab in Midnight Blue
Previous: 01 Boxster in Arctic Silver, 86 944 in Guards Red
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10-14-2008, 04:47 AM
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#6
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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i just passed the inspection, i had a CEL few days prior, and just turned it off with OBD reader...they dont really care here.
i passed inspection with straight pipes on my other car 3 yrs ago as well , pretty neat
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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10-14-2008, 06:32 AM
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#7
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Registered User
Join Date: Jun 2004
Location: Des Moines, IA
Posts: 8,083
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The issue I see is that if you CEL is always on and you develop an additional code, you won't know it.
It seems to me that this could be an issue, no?
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Rich Belloff
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