Go to the 3RZ database post, it will be at the top. It shows how Bigmike, Marlin, Dean's, and Bevin's intakes are all setup. If you look closely, Bevin's is the only one that looks factory. Marlin's and Dean's have just been shortened and have a aftermarket air filter on them. I just looked at some pics of Dean's that I haven't put on computer yet, and it looks like he just shortened the factory intake plastics. Bigmike looks like he made his so he can try to get cooler air! You'll have to get the official word from Bigmike though!! Since he worked on all of them!