H&R 28908-11 Ultra Performance Coilovers go a step beyond the Street Performance kits with stiffer springs and re-valved dampers for those looking for more control and feedback. Ultra Performance coilovers use mono-tube gas shocks to better control damping and provide stable damping characteristics in all situations. Mono-tube shocks are lighter than twin-tube shocks to minimize unsprung weight. H&R damper bodies are a true threaded shock body for better heat dissipation than suspension kits utilizing damper inserts in a threaded housing.
H&R Ultra Performance Coilovers feature H&R's exclusive dynamic damper technology with shocks engineered to work in harmony with the progressive-rate springs creating a finely-tuned suspension system.
Note: Lowering height may vary on vehicles optionally equipped with factory sport suspensions or different engine configurations.
H&R Ultra Performance Coilover Manufacturing: H&R Street Performance suspension kits use threaded plated steel mono tube shock bodies to minimize unsprung weight, provide corrosion protection, and allow high heat dissipation. H&R springs are crafted from a special shot-peened (hf) 54SiCr6 spring steel to ensure premium quality, performance, and durability. All H&R coil-overs are hand-assembled in Germany to rigid ISO 9001 and German TUV standards.
H&R Coilover Install: Professional installation recommended. A suspension alignment will be needed after installation.