Well The installation was 100 because I didnt ahve excess to an air gun and part of the shock assembly was rusted so I couldnt get it off with hand tools. The tires dont really wear that bad but Im getting camber kits anyway. You can do the washer trick for the rear and the front ones are not really that hard. I have had my car lowered since christmas and have driven back to ga from ms several times and not many problems at all.