Grrh! I just had purchased the K&N 3" with filter top assembly, thining it was 'best' for a streeter and no hole in the hood. Nope!
Had a dropped base, about 1.5" Just ordered a flat base as I measured the fit and it should go. Will test by the seat of the pants the idea of duct taping the entire circumference of the 3" filter and seeing if, just using the filter top, it works to where I can feel the near 11 hp gain!