Reviewed By John D (POTOMAC, MD) Reviewed for a 2004 Mercury Grand Marquis —3/25/2015 8:42 PM
This upgrade works best with the addition of a cold air intake system, really no point in doing without either. The open flow can be felt as soon as you mesh the throttle. I would definitely recommend this to someone looking to add some power underunder the hood without letting everyone around you know you have it. Also if you do this with a tune up get ready BC you will have a space craft.