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See the link in the original post for pics on Speed Engineering website. The hose plumbing is very simple. Both valve cover vents go to one side of the catch can. I used the IN side closest to the engine. The passenger side vent tube is above the valve cover and pointing toward the front and the driver side is at the rear of the valve cover pointing up.
The OUT side of the catch can goes to two connections on the intake manifold. The passenger side connection is just behind the throttle body and the driver side is top center of the intake.
The passenger side connections are very short. I routed the driver side hoses in the space under the throttle body and above the water pump.
All the above is for a 2005 LQ9 using a 2004 5.3 flex fuel intake manifold. Others may slightly differ.
The catch can does not have IN and OUT marked, so you can do whatever you like. I got the hose & 3/8" fittings at O'Reilly's.
The clear sight tube is included with the kit. There are no instructions included.