Not Aftermarket Wheels..but different
I am doing a slightly different approach to replacing the stock MM wheels..
I just bought a set of 2003 Grand Marquis LS(E) 9 spoke alloy wheels off E-bay. Yes, they are 16 inchers but that is what I wanted.. Since they are 03 GM's there are no fitment issues (offset, etc), they will bolt right on.. The wheels are shown here:
http://www.mercuryvehicles.com/vehicles/grandmarquis/ext_colors.asp
Next step is to have them powder coated in either argent, gun metal or black. One of the guys in the local SVT group had his wheels done in black powder coat and they look real good on his black Cobra.. My only concern with black is it may look a little overwhelming. I'll play around in Photoshop and see how it goes..
Then I am adding in a set of new Michelin Pilot A/S' in 225/60 ZR16. The height of this combo is 27 inches which is close enough to stock, -5%, that the computer will compensate without a chip per my dealer.. BTW this 5% drop, on the rears, will effectively give me 3.73's without turning a wrench.
Why did I go this route? My MM is my daily driver over under maintained county roads. The lack of a decent sidewall height in the stock setup contributes to a jarring ride. By doing a Negative 2, 18 to 16 inches, as discussed in the snow tire threads, I get a decent sidewall height. That sidewall height will help smooth out the ride. Plus the Pilots are much better tires than the stockers.. Tread Wear 400 AA ratings...Plus I can really rotate them for better wear..
Total cost for this conversion will be around $600 for wheels, including powder coating, and $600 for the Pilots... so for around $1200 I get to be "unique" and should improve the ride...
Meanwhile the stockers will go in to the basement. If I want to change back it's a quick changeover. Plus I can always sell the alloys on CVN on BON..