2007 GT/CS Mustang was a tribute to the 1968 California Special, Ford added a limited production factory GT/California Special in 2007. The 2007 GT/CS Mustang is based on a Mustang GT with a 4.6 liter engine. The GT/CS option adds 2 tone seats (Dove or Parchment inserts), unique floor mats, side stripes (with GT/CS behind the front wheel RH and LH), side scoops (behind doors), 18″ polished aluminum wheels, rolled exhaust tips, faux gas cap (with words “California Special”), lowered front bumper/valance and unique rear bumper. The GT/CS was available as a coupe or convertible, with manual or automatic transmission.
2007 GTCS Mustang
Update: New wheels 2015 Mustang Wheels on a 2007 GT/CS Mustang. 2007 wheels are 18×8.5, 2015 wheels are 18×8. They fit great, no issues. The offset is different because the width difference.