Application: For Lexus IS250/IS350 (GSE20/21) RWD 2006-2013 For Lexus IS F RWD 2008-2014 For Lexus GS300/GS350 RWD 2007-2011 RWD Only, not fit for AWD Specifications: Adjustable Height: Yes lowering 1" to 3" Damping: No adjustable damper force Top mounts: standard rubber top mount front and rear. Front Spring Rate: 12 kg/mm (672 in/lbs). Rear Spring Rate: 9 kg/mm (504 in/lbs). Shock type: Twin tube Spring Preload: 7-10 mm product included: complete coilovers 2 front and 2 rear,a pair wrench for height adjustment. Feature 1. Lowered height adjustment from 1" - 3" which allow lower center of gravity and also add a more aggressive stance. 2. Rubber top mounts help to deliver a smooth and forgiving ride for city use at any speed and rubber joints assist in absorbing hard impacts. 3. Twin-Tube structure allows sufficient stroke within the shock absorber. 4. Complete Suspension Kit of 4 Shock Absorbers & 4 Springs for an easy installation. 5. Separate height adjustment does not affect