I cant decide on what to get seems like volume wise for air and hp gains are similar and really interested in the cooler temps as i live in texas and heat gets ya. When people run the Kinextix V4 Plenum they dont use a spacer also right?

 

Right!!! They both do the same thing. The Crawford plenum is like the 1/2 spacer. One or the other.

 

Running a spacer and Kinetix is not practical. It is possible, but I would not recommend it. Neither would the guys at Motordyne. The Kinetix may not hold up well over time with the spacer because the internal support beam would not do anything and the plenum would be even more prone to crack due to increased volume/vibration.

I've had both the Kinetix and the 1/2" MD spacer. I stuck with the Kinetix

 

I'm obviously partial to the Motodyne spacer. To be honest, I have no experience(s) with Kinetix. I'm sure it works well.

 

The motodyne spacer outperformed the Kinetix by a measureable margin. I forget which one did. I'd go Crawford before I did a Kinetix