Solo-Werks S1 Coilover System - A4 (B8) Quattro & Avant- Premium Entry Level Coilover Suspension!Heavy Gold Zinc Plated Housings for superb corrosion resistanceProgressive rate elastomer bumpstops"New" Black anodized spring perches - double lock ring designPlatform Specific Progressive Spring Rates and Matched ValvingFront 25-75mm(1.0-3.0") Lowering Range (S4 = 0.5"-2.5")Rear 25-75mm (1.0-3.0") Lowering Range (S4 = 0.5"-2.5")3 year Limited Warranty Each Kit Contains:2x Front threaded coilover dampers (w/ dual locking spring perches)2x Front spring + 2x helper spring2x Rear dampers2x "New" Rear progressive rate elastomer bumpstops2x Rear adjustable spring perches2x Rear progressive rate spring2x Spanner wrenchesInstallation Instructions Application / Fitments:Audi A4 B8 08'-14' A4 Quattro AllroadAudi A4 B8 08'-14' S4Audi A4 B8 08'-14' AvantAudi A4 B8 08'-14' S4 AvantAudi A4 B8 08'-14' A5 QuattroAudi A4 B8 08'-14' S5 / RS5 *All lowering ranges are approx. and will varying depending on mileage, condition, vehicle options. Solo-Werks Suspension Systems is a suspension company born from over 10 years of industry experience. Rather than focusing on corporate growth Solo-Werks prides themselves on creating great suspension products while keeping their heart in the industry. Solo-Werks is dedicated to keeping the true spirit and passion of the automotive industry alive by creating amazing products for enthusiasts around the globe.