Let me modify page EC-509 of the '09 service manual to show you how I do it. Where the red x's are I placed K&N crank case breathers on the valve covers. This dumps to the ground/atmosphere. Where the red x's are on the intake (accordion tubes) I placed pipe plugs to seal the holes, no vacuum leaks. I do not remove the PCV valves or the hoses off of these to the intake manny. I simply do not want blow by gasses being dumped into my intake before the TBs during "full throttle" conditions. As LJ stated, this keeps the intake air CLEAN and COOLER, thus subsiding detonation.
