I would think that just removing the bottle and cutting out the section right behind the grill would definately be better than nothing. I even thought about doing that just to try it out but then decided WTH.....the scoop made a difference with the CAI it has to only help out. After adding the scoop I'm definately glad I did. It's a nice piece and has to help directing the air up.
The washer bottle is blocking to much air for those CAIs that pick-up air from the fender well area.
I'm sure the Roto-Fab would perform alot better as well with at least the bottle gone and the whole cut.
I need to lookin into getting some software for my laptop so I can at least learn to look at the A/F ratio things like that.
2SS | M6 | VR w/White Stripes | 1 3/4" KOOKS - 3" Magnaflow | LPE 3.91 gears | ADM tuned | Halltech w/ADM Scoop | Spohn/BMR Trailing Arm/Toe Rod | BC Coilovers| Pedders FE4 ZL1 swaybars | Cradle/Diff/Radius Rod bushings | VMax TB | Morimoto Projectors | MGW shifter | Red Calipers