D2 Racing North America: Premium Suspension Systems & Performance Parts D2 Racing RS Series Coilover 2007 2019 Honda Fit 2011 2016 CR Z D2 Raicing Coilovers Acura TL Spare Parts D2 Racing RS Coilovers for all Makes & Models. The RS Series suspension kit is our most popular coilover. Featuring a 36 way damping and rebound adjustable monotube design, RS Series coilovers are perfect for the modified street car that also sees occasional track days. This coilover has separate height and preload adjustments allowing for optimal suspension tuning while maintaining full strut travel at all times. Features: 36 way damping adjustable monotube shock assemblies Full ride height adjustability with separate spring preload Anodized finish and Teflon coated threads to prevent rust Upper camber plates and pillow ball mounts* (6061 Aluminum construction) 1 Year Manufacturer??? s Warranty Serviceable in the USA