Don't know your emission laws and test in NY,could get tricky if you have to get tail pipe sniffed etc to renew tags.what I mean is if you buy A K&N set up been flowed and tested to be street legal,have seen one made for a Crazy compact stock car but no trucks,same princable I would think.it was made of plastic tube and had all the fittings for sensiors and electrical connections as close to factory positions as possible.Gas milage?perfomance gaine yes.he said he made it for under $100.00 was not a K&N filter it was a differant off brand.have you looked into any power tuners or chips yet.