thanks. there is a considerable difference in the aspec verse stock. 1 - the wheels are 18x8.5 apposed to the 17x8. 2 - the suspension has been "tuned" and it gives a 1" drop and better handling. 3 - the aspec body kit includes the front lip, side skirts and rear body kit piece. The spoiler isnt an aspec part, but was an option. 4 - sport steering wheel, 5 - high performance brake pads (for autos) The ASPEC package was $5,000 from the dealer new.