AST 07/2020- BMW 4 Lowering Springs - 30mm/30mm

AST Suspension builds some of the most precisely engineered dampers available for performance and competition vehicles. Whether you're building a dedicated track car, a dual-purpose street/track machine, or a show car that needs dialed-in stance and handling, AST's lineup of coilovers and shock absorbers delivers the adjustability and build quality serious drivers demand.Popular UpgradesThe AST 4100 series coilovers are a favorite for street-driven enthusiasts wanting meaningful performance gains without sacrificing ride quality. The 4150 and 5100 series step up to more aggressive damping curves suited to autocross and circuit work. AST also offers remote reservoir setups and custom valving for purpose-built race applications where every tenth matters.Are AST coilovers adjustable for ride height?Yes. AST coilovers feature threaded spring perch adjustment, allowing you to dial in ride height independently of shock travel. Many models also offer rebound and compression damping adjustm...

Shop lowering springs at Black Ops Auto Works for improved stance, reduced wheel gap, sharper handling, better road feel, and a more aggressive performance look. This collection includes sport springs, performance lowering springs, SUV lowering springs, Pro-Kit springs, Spec-R springs, Super Sport springs, OE sport springs, lowering coil kits, front lowering springs, rear lowering springs, and vehicle-specific suspension upgrades for cars, trucks, SUVs, EVs, muscle cars, and performance platforms. Use this Lowering Springs collection to find the right spring setup by vehicle platform, drop amount, brand, suspension type, and driving goal. Lowering springs are a popular suspension upgrade for drivers who want a lower stance, improved cornering stability, reduced body roll, better wheel fitment, and a cleaner appearance without moving to a full coilover system. Shop Lowering Springs by Category Black Ops Auto Works carries lowering springs and performance spring upgrades across key ca...

Shop aftermarket suspension parts and kits from Bilstein, KW Suspension, Ohlins, Fox, KING, ICON Vehicle Dynamics, BC Racing, Silvers, Eibach, H&R, Swift Springs, Whiteline, Energy Suspension, Moog, SPC Performance, Rough Country, ReadyLIFT, BDS Suspension, Skyjacker, Air Lift, Firestone, and Black Ops Auto Works. Find coilovers, lowering springs, lift kits, leveling kits, shocks and struts, sway bars, control arms, tie rods, ball joints, bushings, subframe braces, alignment kits, air suspension systems, and vehicle-specific suspension packages for cars, trucks, SUVs, Jeeps, and off-road builds. Start with a matched shock-and-spring package or a full coilover kit before layering in sway bars, chassis bracing, and camber adjustment hardware. Shop by category, brand, vehicle year, make, model, and trim. Aftermarket suspension systems improve handling, ride quality, and ride height adjustment beyond what factory suspension provides. From lowering springs and coilover kits for s...