Just a quick run through. I installed this on a vehicle that also had a k&n intake . Buyer should know that you will need to trim the 90 degree elbow that come off of the throttle body and goes to the intake for installation. Otherwise it will hit the cooling fan .. I ended up doing that and it was still to close for comfort ( i did run it for a week like that no issues ) but ended up buying another elbow that is 4" wide on the throttle body side and 3.5 on the intake leg and trimming that down so it got perfectly . The spacer doesn't make as much noise as you would expect and it's unclear as to where the flat ear on the spacer is supposed to go but otherwise the product is good . I did notice a small amount of different at lower speeds