The only thing a spiraled throttle body spacer will do is make a really annoying whistling noise when you accelerate. As for the Hi-performance Air intake kits, some work and some don’t. It really depends on how restrictive the stock air box is. I put a Brute force on my Wrangler and it pretty much did nothing (the 6cyl has a very non-restrictive air box) except give it a nice growley sound when accelerating. My buddy put one on His PT Curser and it was a noticeable difference. I don’t get my H3 for another 5-7 weeks so I cant tell you for sure if it would be worth it or not.
