I'm using Scorpion/Sapporo ducts and the direct vent block off plates. The biggest problem is hooking up the side ducts to the central outlet. That blow molded channel doesn't have much clearance for a side port to be connected so it looks like I'll be having fun with a big hole saw and urethane sealant. The Scorpion outer ducts pass through the steering mount frame and the back corner of the glovebox perfectly... they don't align with the side vents 100% though. I've got some assing around to get it to work but I want something better than just the windshield and the central vents. Good resource material there tortron