To fully enjoy Dinan performance spring sets we highly recommend pairing them up with our supplemental ride quality and handling kits. This additional kit includes tuned, progressive rate bump stops that maximize suspension travel on the lowered car for improved handling capabilities and ride quality when compared to just a spring set. By allowing for full compression travel within the spring the possibility of a sudden inchbottoming out inch is negated, a common unwanted side effect when lowering a vehicle. ÊBump stops also have the added benefit of optimizing the spring rate rewarding those that use them with added mechanical grip and cornering power. Simply put, the Dinan supplemental ride quality and handling kits amplify performance and comfort when paired with performance spring sets.ÊNOTICE:ÊDinan Performance Spring sets should be purchased and installed with the corresponding Ride Quality and Handling Kit to achieve the advertisedÊride height, performance, and ride quality. While not explicitly required,Êif the matching component is not purchased and installed you will get less than favorable results in the form of poor ride quality and improper handling traits. While we will maintain a full warranty on product defects, any claimsÊagainst the carÕs improper handling/ride quality traits due to not purchasing the corresponding handling kit will not be warranted.