Headers
I've been looking around for a while to find some 200 cell cat headers for my Boxster. Since it is a weekend cruiser as well as a track car, I still need to pass emissions here in Phoenix AZ so I would think that the 200 cell cat headers should be ok for me since I have already installed secondary bypass pipes. I'm also looking for an extra few HP this would give me on the track.
I emailed TopSpeed and they don't have anything for my car. It seems as though there are 2 options: Fabspeed (expensive) and NHP. The other option is to just dedicate it to the track and put straight headers, but how big of a job is it to switch between stock and track headers? Is that something that is practical? |
Swapping headers would be a pain. If you just need a couple of HP, convert to electric steering pump. Gets rid of the parasite drag on the motor and save 10 more lbs. UDP and electric steering might get you 8 HP. Cheap mod too (less than $400) if you make your own kit with a Vauxhall pump (same pump as a Cup car). It's made by TRW. Buy the pump on UK eBay. I got mine for $80 US shipped. I am collecting the rest of the pieces and planning to do the mod next month.
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I looked into electric steering when my power steering pump was leaking last month, but I just ran out of time so I put in an OEM pump again, but the next time I might go electric... I already have UDP;) |
You can get 200 cell integrated cat headers here in the UK on ebay.
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As long as the check engine light does not come you are good for the smog test. In Maricopa county they never actually check the exhaust gases so a 200 cell cat would likely be fine.
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Do you have a link for them? |
https://www.topgear.co.uk/exhausts/porsche?mfp=15-model[Boxster] These crop up on ebay quite regularly.
For the UK and Europe the standard 986 cars come with catless headers and rear cats only. |
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So I've already gone down the road of replacing the secondary cats with pypass pipes, leaving the original headers with primary cats in place, and so this is why I want the 200 cell cat headers. I believe I would have to extend the wiring of the O2 sensors that are currently on the header cats (before and after) so that I could go with the Euro configuration. I wonder which configuration is more efficient... |
The European way obviously ;) If the cat headers were best then the car would be designed like that from the start :D
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