i'm seeing as high as 6* at WOT. i'm getting KR pretty much anytime i enter boost over half throttle. i'm pretty sure it's the pcm tune causing it. i don't know much about tuning but i believe the timing is too high and know it's running lean now because i have a vacuum leak. i can hear it hissing around the throttle body / EGR area. i just bought a 3.6 to see how it affects the KR. if after i track down the leak and put the 3.6 and i'm still seeing KR , i'll try a new pcm.
i'd put the kit in. too many positive reviews to not do. it certainly hasn't hurt my car any , it just didn't change the feel of it as much as i expected.
