I have the old Kenne-Bell ram air. I installed in back in 1989. It looks good but does squat. It also fits too tight on the filter and starves for air once you are a step up from stock. I cut off 3/4 of the filter housing so it can breathe and still get some fresh outside air. I also ran with and with out it at the track and there was no difference with the outside air. It was the hot item back then.
Agreed. A 9" filter can be substandard even on our engines. The 14" is plenty. Chuck Leeper had a website that had a formula to use for calculating air filter requirements. I don't remember the site, but after reading it and doing the math, the 9" was just a notch undersized.