I have 20"s you still have great suspension only difference is you feel the road a lot more and driving over potholes and such don't feel too nice. I have no rubbing problems at all.
www.lskoncepts.com is probably the only functional site/store devoted to the lincoln ls besides
www.llsoc.com which is a community forum. The website is ran by Greyghost1, a very reputible person who contributes greatly to this forum.
Most people have the wings west spoilers on their cars which IMO look kinda funny but still give the rear end a little more definition. I personally think that this spoiler would look nice but i have yet to see a car with it.
http://cgi.ebay.com/ebaymotors/ws/e...tem=7957673877&category=33638&sspagename=WDVW
There are no 'cheap' mods for this car but you can get nice intake system from
www.llsoc.com
You have the magniflow exhaust system aswell as others for exhaust.
You can flash your PCM to get ~15-20 HP with SCT-Xcallibrator
http://www.fordpartsnetwork.com/sct1-X.html.
Have to make sure you have the olders style headlights before you attempt to clear your corners. Make sure the clear part and the black plastic part are bonded together with a grey colored glue, if its black then you won't be able to clear them out very easily and if you do then you will be one of the first.
good luck