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H&R Suspension Inventory H&R's simple philosophy, "build the best, & the rest will follow," has resulted in world-wide success. Their racing experience — supplying the World Championship-winning Porsche & AMG Mercedes teams — gives them an edge in suspension tuning & design. Every H&R component is made in Germany & is tested & approved by the German government's TUV agency for quality, safety & reliability. Additional testing & research is done in their U.S. facility, right outside Seattle, to fine tune its systems for optimum handling, balance & ride quality. Every H&R part is crafted in Germany to exacting international ISO9001 standards, ensuring that it will perform with the same precision & reliability years down the road as it does the first time you roll it onto the street or track. Every H&R spring, whether designed for a Civic or a LeMans-winning Porsche GT1 prototype, is precision-wound with the highest quality German spring steel available. It's heat-treated twice to realign the molecular structure for long term resilience. It is shot-peened, inside & out — a process that extends the service life of the spring more than 200%. Each spring is pre-set using Super-Blok(TM) technology a total of four times to establish its final length, & tested for ride height & spring rate. It is then electrically-charged phosphate-coated, painted with a special polyurethane-epoxy powder coating & oven-cured to create a hard, corrosion-resistance shell.