Not sure which 1999 Mercury Grand Marquis Cold Air Intakes are right for you? We have over 18563 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Put this intake on and it was a little loud as with all intakes at first, once the ECU adjusted to the new intake it's quiet until you stomp on it, then a throaty growl flows out the front end, it's also helped my fuel economy as well, I'm filling up at the pump a little less often. Great product bolts right on without any modification and it's well constructed as well as keeping a stock like appearance." —Chris F from Overland Park, KS bought an aFe Cold Air Intakes for a 1999 Mercury Grand Marquis, 4.6L V8.