Cxracing 91-97 BMW E36 Damper Coilover Suspension Kit CXRacing Damper CoilOver Suspension Kit for 91-97 BMW E36 Mono-Tube, Top Mount, 32 Step Damper & Ride Height Adjustable Spring Rate: Front 10kg(558 lb/in) / Rear 5kg(279 lb/in) We offer one year warranty for manufacturing defective parts. Professional Installation is a must for this warranty, without a professional installation receipt, warranty is voided. Bad part must be returned for inspection for exchange new part.