I dont want the stock assemboly anymore i want an aftermarket good one that might increase horsepower/mpg

 

I recommend the K&N FIPK II kit, it has the heat shield and all the hardware needed for the install and your butt dyno will feel the difference. for more upper end hp, swap out the cone filter for a 9x7 K&N filter, made a noticeable difference in upper end hp.

whatever you do, make sure you have some kind of shield to prevent the filter from sucking in engine compartment heat.