2004-05 GTO Lowering Springs-the progressive-rate spring package yields noticeably sharpened handling characteristics without an accompanying degradation in ride quality. Ride height is reduced by one inch, providing both a more aggressive stance and a lower center of gravity. Kit includes two front and two rear springs. NOTES: This package has been designed to work with STOCK-SIZE wheels and tires (245/45-17 on 17 x 8) and may cause tire-to-body contact if installed on a vehicle with a larger wheel/tire combination. Professional installation and subsequent four-wheel alignment strongly recommended. Camber kit #70027 required to maintain proper rear camber. Shipping is not included.