hey i have and 06' z with the rev up engine would it be more beneficial to get a plenum spacer or an aftermarket intake manifold?

 

welcome to the forum. please take some time to read some of the threads in the different sections since most likely any question you wish to ask has already been answered.

Try checking out this section for instance. I am sure you will find all you want about plenums and plenum spacers.

https://my350z.com/forum/engine-drivetrain-50/