[RET_COP]

Thanks Rick, I agree, in a light car with a 5-speed it's worth the change. I'm going to see if I can get one on my car without interference. I cut the divider and added a 4 hole spacer to my performer RPM and the car felt better through mid range and high rpms. I lost nothing at all in the low rpms. That was my indication that I could move to an open plenum and be ok.
Since I went to bigger primaries my engine just want's to breath, so breath it will.