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H&R Street Performance Coilover Kit for 2017-2023 Audi A4 45 TFSI Premium Plus AWD (B9) w/o Sport Suspension, 48.5mm Front Strut spl-parts-pro-end-links The KSport Airtech Pro PlusH&R Street Performance Coilovers for your 2017 2023 Audi A4 45 TFSI Premium Plus AWD (B9) are the perfect suspension solution for discerning drivers from daily drivers to serious tuners who can appreciate awesome handling and superb ride comfort. Each coilover shock is custom valved to work in conjunction with a precision engineered progressive rate spring, creating a finely tuned suspension system. The fully threaded shock body allows for adjustable