So I decided to switch my HPS SRI to a cold air. Max at HPS hooked me up with the extension kit. The toughest part of the entire install was fishing the pipe thru the fender. I ended up using a dremel tool to widen the opening in the fender. Everything else fit properly with no issues. In my opinion the CAI is louder than the SRI at over 3grand. I can feel the difference in the mid and high range.