Steve used just the SL55 Y-Pipe that goes from his factory airboxes to the throttle body.
The bottom picture is a complete SL55 intake - (Airboxes, Y-pipe, Snorkel tubes) The SL55 airboxes are 25% larger in size then the factory SRT and the I/O ports are 3" so you get a true dual 3" CAI to feed that hungry SC.
You can see by the below picture that the silver paint is just a touch off. Nothing a spray can and some clear won't fix.