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Old 09-07-2012, 08:36 AM   #1
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Need CA cat & cat back exhaust for 2000S

Cats are shot on 2000 S, failed smog test. Most cats I see on internet are '49 state legal' (i.e.: not CA). I'm looking for a bolt on solution as I have no experience welding. I'm a DIY guy, and will consider header, cat, cat-back replacement to gain HP, but don't want to spend $$$$ for 10 - 20 HP gain. Suggestions?
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Old 09-07-2012, 01:24 PM   #2
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As a FYI datapoint, my 2002 S just passed smog in San Diego, with secondary cat eliminator pipes ;o) Measured was a fraction of allowable. The tech (thorough, but his first Boxster) gave up looking for vacuum hose check etc. when I explained you have to disassy the car to get to the engine compartment. He just plugged in, ran the dyno, and passed me.
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Old 09-07-2012, 04:37 PM   #3
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Originally Posted by rujorujo View Post
Cats are shot on 2000 S, failed smog test. Most cats I see on internet are '49 state legal' (i.e.: not CA). I'm looking for a bolt on solution as I have no experience welding. I'm a DIY guy, and will consider header, cat, cat-back replacement to gain HP, but don't want to spend $$$$ for 10 - 20 HP gain. Suggestions?
What makes you think the catalytic converters are shot?
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Old 09-08-2012, 12:44 PM   #4
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How do I know cats are shot.

Professional mechanic assessment (German car specialist) after check engine light came on.
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Old 09-08-2012, 02:26 PM   #5
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I just put bypass pipes on my 2000 base model. Still good. Not sure if these would work on an S of the same year, but I'd let them go at a reasonable price as they're not needed now.
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Old 09-08-2012, 03:31 PM   #6
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Professional mechanic assessment (German car specialist) after check engine light came on.
Were you running your Boxster with a CEL any length of time before the smog check? Did the mechanic give you what P-Code(s) were being reported by the ECM?
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