Believe it or not, the OEM air box offfers 100% cold air induction. Also, the OEM air filter is a Donaldson filter which offers smallest micron protection and very high air flow. The only thing restrictive is the air intake tube. If I had to do it all over again, I would just install the Airaid intake tube or Air Doc tube. If you must replace the entire thing for performance reasons, the Volant kit is really the only aftermarket option that also offers 100% cold air.