Godspeed(MRS1550-A MonoRS Coilovers, Nissan 350Z 03-08(Z33), Fully Adjustable, Set of 4 Fits 2003, 2004, 2005, 2006, 2007, 2008 Nissan 350Z(Z33);Front: 12 kg/mm, Rear: 10 kg/mm 52mm Mono-Tube Stainless Steel Shock With 32 Levels of Damping Adjustment Corresponds to Daily Driving Scene To The Sunday Track Performance Internal Piston With Koyo Japan 6204z Bearing Provides Smooth Stroke; Powder Coated CNC Machined Aluminum And Carbon Steel Accessories Independent Spring Tension And Height Adjustment; Racing Grade Shock Oil With High Viscosity Index; Shock Absorber Can Be Replace Or Rebuild When Worn Out Full 1 Year Limited Warranty From Date Of Purchase; Install By Experienced Professional Is Highly Recommended