My 05' GTO has had uneven wear on the inside shoulders of the rear tires since I bought it. I added about 200 lbs to the trunk in stereo weight and its dropped the rear down a little. I've had the alignment down twice and gone through three sets of rear tires in 50,000 miles. I was told by another GTO owner that a new set of stiffer race springs (From Pedders) may raise it back up a little and most importantly fix the uneven tire wear. I'm just looking for some confirmation or another solution. Thanks.