I purchased my truck which already had a K&N intake in it, I knew it was not what I wanted. I did my research for the best Cold Air Intake there was and Stillen came on top. I purchased it, got it installed and the difference in performance is night and day. I'm extremely pleased with my decision in going with Stillen. By the way, I hardly ever leave reviews but I felt this one warranted a good one. Thank you, Stillen, for such a great American made product.