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Old 02-04-2011, 03:33 PM   #1
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cats

what year did the boxster come out with the exhaust system that has 4 catalytic convertors as opposed to 2? and why? are they interchangeable? ie.. i have a rattle in my rear most right cat of the 4...can i purchase from a boxster that has only 2 cats and replace it? will it fit? how do i plug the oxygen sensor hole?

thanks for any advice.

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Old 02-04-2011, 03:58 PM   #2
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Quote:
Originally Posted by tuanle16
what year did the boxster come out with the exhaust system that has 4 catalytic convertors as opposed to 2? and why? are they interchangeable? ie.. i have a rattle in my rear most right cat of the 4...can i purchase from a boxster that has only 2 cats and replace it? will it fit? how do i plug the oxygen sensor hole?

thanks for any advice.

The 2.7 and 3.2 engine variants were equipped with 4 cats. The secondary cats can easily be deleted with no concerns regarding emissions or cel's .
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Old 02-04-2011, 04:33 PM   #3
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Some one say cats....





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Old 02-04-2011, 09:27 PM   #4
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with a simple ROW flash you can go CAT FREE which is good for those people with allergies
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Old 02-05-2011, 05:43 AM   #5
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Originally Posted by Johnny Danger
The 2.7 and 3.2 engine variants were equipped with 4 cats. The secondary cats can easily be deleted with no concerns regarding emissions or cel's .
what year is that? and how do i just bypass it?
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Old 02-05-2011, 10:38 AM   #6
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Originally Posted by tuanle16
what year is that? and how do i just bypass it?

Boxsters were fitted with 2.7 and 3.2. engines from '00 onward . In order to bypass the secondary cats, you'll need to purchase a set of bypass pipes . Fabspeed and Schnell are two companies that come to mind .
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Old 02-06-2011, 03:03 PM   #7
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Quote:
Originally Posted by tuanle16
what year did the boxster come out with the exhaust system that has 4 catalytic convertors as opposed to 2? and why? are they interchangeable? ie.. i have a rattle in my rear most right cat of the 4...can i purchase from a boxster that has only 2 cats and replace it? will it fit? how do i plug the oxygen sensor hole?

thanks for any advice.
MY 2000 is when the standard box got a 2.7 motor. At this point, they all recieved 4 cats in USA spec. I think they did this due to emissions restrictions...

See the attached link from 2007. J.Fro does a great job of commenting here.

http://www.986forum.com/forums/showthread.php?t=11860

So after reading that, you need to go back to a pre-2000 or just get rid of the cats altogether. I did and I love it! You do NOT have to reflash DME either. I have a mechanic in Nashville, Tn that can do it with no additional DME mods.

Here is a couple of other options out there too... They do cost though...

http://www.design911.co.uk/fu/pt63_399_-cma81-cmo82-ct287/Porsche/Boxster/Boxster-986-25L-1997-99/Catalyst---Bypass/

http://www.design911.co.uk/fu/pt63_620_-cma81-cmo82-ct287/Porsche/Boxster/Boxster-986-25L-1997-99/Exhaust-Package/

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