The best filtration you are going to get is the oem filter...it is a uni 2-stg filter...only both stages are more dense than any of the aftermarket versions...
I am not familar with what you have...but no foam filter is going to flow as much as the fabric filter...and no fabric filter is going to filter as fine as foam...
Additionally...your air flow is limited by your air box and the i.d. of the filter element...
The oem filter element is restrictive due to density of foam and the perforated frame the foam sleeve is mounted on...
I have a used stock air box with air box lid delete and clamp-on 2 stg foam filter for it 4sale now on our website...
It is a big jump up from stock air intake and still uses foam filter...allows you to choose with or without lid...with or w/out snorkel...comes with complete jet kit so you will be able to tune for whatever configuration you want...and you can use a k&n filter with this intake if you want to...does not come with one tho...
We have a custom air intake that is way better for power...fabric filter, complete eliminates the air box...
That is if you have a 660... you didn't say and you didn't put that in your info in your signature or the upper right corner of you post header...
I am not familar with what you have...but no foam filter is going to flow as much as the fabric filter...and no fabric filter is going to filter as fine as foam...
Additionally...your air flow is limited by your air box and the i.d. of the filter element...
The oem filter element is restrictive due to density of foam and the perforated frame the foam sleeve is mounted on...
I have a used stock air box with air box lid delete and clamp-on 2 stg foam filter for it 4sale now on our website...
It is a big jump up from stock air intake and still uses foam filter...allows you to choose with or without lid...with or w/out snorkel...comes with complete jet kit so you will be able to tune for whatever configuration you want...and you can use a k&n filter with this intake if you want to...does not come with one tho...
We have a custom air intake that is way better for power...fabric filter, complete eliminates the air box...
That is if you have a 660... you didn't say and you didn't put that in your info in your signature or the upper right corner of you post header...