$2200 on my kitchen table

[husker boxster]

Originally Posted by Jamesp

What kind of power improvement might be had with the GT3 plenum, and how will you implement it?

Honestly, not that much. 10-15hp is the estimated advantage. Not much bang for the buck when you consider I paid $860 for it. But that was 25% off and I had Christmas money to spend, so why not?

From what I've read, this mod should be in conjunction with a set of headers with fewer / smaller cats and a software upgrade. I haven't descended to that part of the slippery slope yet and don't think I will. That would be another $2K for a potential +25hp. I could spend that kind of money at Porsche driving school and make that much improvement in skill.

Not sure what you mean by how will I implement it? I will be doing the change myself and the only dyno I have is a butt dyno. My hope is it doesn't affect daily usage and gives me that little extra push vs other 987.1s. Hope that covers your question.

[Gilles]

My hope is it doesn't affect daily usage and gives me that little extra push vs other 987.1s.[/QUOTE]

I installed the IPD plenum along with the large GT3 throttle body about 5 years ago and I don't thing that you will notice any downside on a daily driver, IMHO the biggest difference you will notice is a very smooth power curve and perhaps a 'relaxed breathing' (...?) at the higher rpm range.

I also have the SpeedArt exhaust that complements the IPD, I would love to have a nice set of headers ($$$) but one of the main brand manufacturer (cannot remember whom..) told me that the real improvement would be with a catless header.
Unfortunately, living in CA that may not be a very good idea, unless you want to remove them every other year to pass smog..