I installed an intake the other day, but the crankcase vent is left open with nowhere to attach on the intake...

Should I get a filter for it or should I get a catch can for it?

Here's a pic of what I'm talking about...

 

Get a Breather filter for it.

 

Breather filter is the cheapest and easiest way for sure. Catch cans are nice though, I run the Saikou Michi dual setup.

 

That's what I do, works great and no oil in the intake.

 

Make sure you get a good filter. I got a cheapo at Advanced and it blew the cone off the plastic...

 

I would just get a catch can...I got the Jaz catch can from MAP...cheap and works well...

 

Get the proper fitting welded onto your new intake, use a good catch can "Saikou Michi" and do it right. That hose was there for a reason.