Yea they might not work... Definitely gonna have an issue with the rear carb and the brake master... But I've got a pretty short manifold so I've got more room - ~ 2" between the horn and the master
Any filter will restrict flow compared to open. Hence why I pulled mine off for the second session at the track.
These are more for street use to keep crap out of my motor... Like the sand cloud I drove through on my way home from the track... With no filters on... Doooohhhh... Was hoping for something that was easy on and off but had better filtering then just steel mesh.
If they don't work I'll just exchange em for those steel mesh caps you all run