AST BMW G80-G81 M3 G82-G83 M4 AWD / G81 M3 X-drive 2021- AST 5100 Competition Series Coilovers

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 coilovers from KW Suspension, Bilstein, FOX, ICON Vehicle Dynamics, Ohlins, Silver’s NEOMAX, BC Racing, Fortune Auto, Feal Suspension, Yellow Speed Racing, Fabtech Dirt Logic, Ridetech, QA1, H&R, Whiteline, AST, Eibach, and Black Ops Auto Works. Find non-adjustable coilovers, single-adjustable coilovers, double-adjustable coilovers, triple-adjustable coilovers, and remote-reservoir coilovers engineered for street cars, track cars, drift cars, off-road trucks, lift-application SUVs, and dedicated race platforms. Coilovers combine a shock absorber and coil spring into a single adjustable unit with ride-height, spring-rate, and (on adjustable models) damping adjustability. Shop by vehicle year, make, model, application (street, track, off-road, drift, race), adjustability tier, spring rate, and reservoir configuration. Coilovers are the primary suspension upgrade for enthusiasts who want ride-height control, tunable spring rates, and (on adjustable models) damping tuning —...

Browse premium coilovers and suspension components including coilover kits, coilover shocks, coilover springs, lowering springs, shock hardware, suspension boots, dampening adjustment components, and performance suspension systems for trucks, SUVs, muscle cars, off-road builds, and street performance vehicles. Shop Top Coilover & Suspension Brands Find trusted suspension brands including Silver's NEOMAX, FOX, QA1, Eibach, ICON Vehicle Dynamics, Bilstein, KW Suspension, Ohlins, Ridetech, Fabtech, and ARB/OME. These brands are known for adjustable coilovers, performance shocks, lift and lowering suspension systems, coilover springs, and suspension hardware for daily driving, off-road use, drag racing, and track-focused builds. Coilovers & Components for Street, Track & Off-Road This collection includes complete coilover kits, front and rear coilovers, coilover springs, shock boots and protective covers, dampening adjustment extenders, suspension hardware kits, lowering spr...

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...