It is awesome quality, use a UNI, not K&N.
Regardless, mounting sucks, the best way to mount this is go buy some sheet aluminium. Ditch CFM mounting system. Go study how PB aluminium airbox mounts over rails. Cut sheet and wrap over top frame rails drill holes in CFM so it is suspended by frame rails. There is no welding required just cutting and drilling, mount this way.
If you go to the ebay listing from CFM there is an make an offer option. They used to take 75 which is what i got mine for I tthink I heard 90 now. But anyway will save some money.
I love this box. few tips however, The boot they give you sucks if you have 26-30mm carb (hard to seal). You can get a better carb boot that will seal better here .......(thank AWK)
Intake Pipe Reducer
The way CFM wants you to mount it is ridiculous. Mine and my buddies both had holes drilled incorrectly to match up on 03-06 frames.
The PB box had way better mounting system and better carb boot, but they are smoking asking like 225. The CFM is so easily modded to mount the same way.
IMO, PB makes some nice stuff but extremely overpriced (why I don't do business with them). CFM FTW with custom mounts