I have a 2006 Infiniti M35 Sport and I just added the Kinetix SSV manifold and the matching cover to the upgrades. According to most websites, this SSV is not able to fit on the M35, it is a very tight fit, but it can be done and I am very happy with the look and results. I currently have the Injen CAI, GReddy SP2 exhaust, and now the Kinetix SSV. I have heard that the SSV really doesn't give much as far as horsepower gains or torque compared to just a 5/16" or a 1/2" plenum spacer; however, I think that the SSV looks a hell of a lot better. Also, the aggressive growl I get while accelerating is amazing, much better than with the stock manifold.
Here is a link to a YouTube video I made for a couple of my buddies that are deployed in Iraq right now that wanted to hear it:
http://www.youtube.com/embed/KHW6-aSR_-k
QUESTIONS:
Does anyone have any suggestions as far as brands for headers?
What is more reliable/worth the money?
Is there anywhere that makes a polished throttle body?