I am trying to pick which plenum I should get. I know that Kinetix just put out the new V+. I also have heard good things about the crawford plenum. I am not sure whether to go with a spacer or a full replacement. I realize there is a search button but everything that I have found is old. I know there are new products that have come out and I have not found any good threads. Thanks for any help.

 

I can speak for the APS full plenum replacement. Good side is it's attractive, I definately felt the gains it gave my Z, it's the last mod I installed a few weeks ago. Their is absolutely no change in the sound under the hood, it is stealth as far as sound goes. I used to have the Kinetix plastic plenum and it was noisy as ****. So my conclusion is it, the APS plenum, works very well.
The one downside of this and most plenums is I had to get the strut tower brace replacement as the stock one won't clear the new plenum. But that looks custom & attractive too.

 

If you're staying NA get spacer. If you going FI you cant go wrong with either Crawford or APS plenums.

 

Is the spacer going to give me the best performance or will it be lower then the full replacement.