maXpeedingrods Coilover for Kia Optima 2011-2015, 24 Levels Damper Adjustable Coilovers Suspension Kit Strut, Height Adjustable Shock Absorber T6 Upgraded Lowering Kits Blue

【Fit Perfectly】 for Kia Optima 2011 2012 2013 2014 2015; Note: New sway bar link is required for SX trim 【Street Performance T6 Series】 Suitable for street performance driving, Upgraded damper knob (easier to adjust), high-quality damping oil with better viscosity, upgraded full aluminum plates. Achieve the balance between comfort, speed and safety 【24 Levels Adjustable Damper for More Control】 Level 0-8 suggest for street use；Level 9-16 suggest for mountain use；Level 17-24 suggest for race tracks use. You can adjust it at any time to suit your needs 【Spring Rate】 Spring rate Front: 9.0 kg/mm(504 lbs/in) & Spring rate Rear: 7.5kg/mm (420 lbs/in) with spring preload: 7-10 mm. High tensile performance spring - stress tested over 600,000 times while the spring distortion is less than 0.04% 【Adjustable Height】 Thread-type ride height adjustment for 1-3 inches(does not keep the original ride height), allowing you to have a more aggressive stance. This design helps eliminate turning noise and also improves steering feel and response