[rappyfreak]

Not sure on the xx but on the raptor, the stock plastic filter base opening is also smaller in diameter than the pro design so there is less restriction with the latter and is the same diameter as the intake tube (boot). Just something to check.

 

[rappyfreak]

I wouldn't. It will suck the filter together and really prevent air flow. When we cut it there was no issue and it increased our airfow a good bit.

Totally agree.

Use simple green to clean filter as well, detergent wont be so good. If no simple green then you can also use Dawn, works well but not as well as mineral solvent... they say it degrades the glue on the filter but in 15 years of racing had never have this happen.