Hey guys, So im dropping my car on sportlines and putting 20s on with a spc camber kit. I need to get a alignment and every shop i call tells me some different ****. With 20s do you align it to factory settings or are there new specs you should fallow to compensate for the wider wheels? Several shops told me that bringing a car back to factory specs with wider tires will ruin my tires and they need to calculate new specs for my setup and it will cost $150 instead of the normal $89. Is this true?

 

i'd have them align your car with the specs for OEM 18s since you have an '03. Just make sure toe is dialed in between 0 and 0.08 in the front, 0 and .22 in the rear, and total toe of zero (both front and back). camber is not adjustable up front without a camber kit, but you can have them set the rear as you like it (within reason - I try to keep mine between -1.5 and -1.75).

factory specs for an '03 coupe can be found here:
http://psedog.com/cars/fsm/g35/coupe...fwd.pdf#page=6