westy66

How have i never heard of this part. There are a lot of Cayennes here with rear cat deletes and some with exhausts, but this seems like a great upgrade for under a grand and im quite surprised by proclaimed HP/TQ bump. 30/32

Can anyone share their experience / results?



http://www.suncoastparts.com/product...e=9552TTPERFOR

wrinkledpants

Some light reading for you.

http://www.6speedonline.com/forums/c...bs-really.html

westy66

Haha. Exactly what I suspected when I read the parts description

hahnmgh63

I have the IPD plenum. I didn't pay full price but got it on a parts clearance for almost half as mine (stock plastic) had a crack starting in it. I doubt it makes more than 5bhp but besides being aluminum it the casting does have a nice airflow diverter that the stock really doesn't have to smooth out airflow. The slightly larger size with the better airflow is probably worth something but mainly for me it was replacing another cheap plastic substandard failing part that Porsche used. On Turbos it is not uncommon for you to find a cracked or de-laminating plastic Y-pipe. It is made of something like two or three layers of plastic so sometimes you just find the layers coming apart. It's a nice strong piece but I would not pay full price for one.

Stage7

Interesting read about the plenum. It seems like many of the 997.1 tt guys have the same opinion, but it seems to make very measurable gains in the 997.2 TTs by the accounts I've read. Mostly in power under the curve rather than peak hp.

Seems to be a similar effect as the FAST intakes on Ls7 cars (not much peak hp, but strong gains under the curve).

Also, Renaissance Man made his own enlarged plenum/y-pipe in his heavy bolt on CTT and reported a huge difference in seat of the pants and recently went to the dyno with great results.

That said, I haven't read a good review of the IPD plenum for the Cayenne except for build quality.

Like anything, it's the application and whether or not a specific part is a bottle neck at specific power levels.