AST 03/2014-07/2021 BMW 4 Lowering Springs - 40mm/40mm

AST Suspension coilovers and dampers for BMW M3, M4, and M5, Porsche 911, Volkswagen Golf and ID Buzz, Audi platforms, Toyota Supra, and Honda Civic Type R are stocked at Black Ops Auto Works. Shop AST 4150 and 5100 series coilovers, single and double adjustable dampers, and complete suspension kits engineered for European and Japanese track and street applications. Every kit is filterable by year, make, model, and trim so the correct application ships the first time. Black Ops Auto Works carries 269 AST Suspension SKUs across coilover, damper, and component categories. What This Brand Covers AST Suspension is a Netherlands based manufacturer specializing in high end coilovers and dampers engineered from motorsport experience, supplying suspension components to touring car and GT racing teams before adapting the technology for street and track day applications. AST kits are built around precision valving and adjustable damping to give drivers control over both ride quality and h...

Shop lowering springs from Eibach, H&R, Swift Springs, RS-R, UMI Performance, MaxTrac, aFe Control, Ford Racing, Whiteline, Vogtland, ST Suspensions, Belltech, Skyjacker, and Black Ops Auto Works. Find sport lowering springs, Pro-Kit springs, Sportline springs, Spec-R springs, Super Sport springs, Race springs, Down Sus springs, adjustable lowering springs, SUV lowering springs, truck lowering springs, and EV lowering springs for street cars, muscle cars, sport compacts, European performance platforms, SUVs, trucks, and modern EV builds. Lowering springs are the simplest way to drop a vehicle’s ride height. They keep the OE shocks, upper mounts, and suspension geometry components in place and swap only the coil springs for shorter, progressively- or linearly-wound performance springs. Shop by vehicle year, make, model, trim, drop height, spring type (progressive vs linear), and application (street, show, mild-handling, SUV, EV, truck). Lowering springs are the correct choice...

Suspension parts and complete kits for cars, trucks, SUVs, Jeeps, and off-road builds are stocked at Black Ops Auto Works. Shop coilovers, lowering springs, lift kits, leveling kits, shocks and struts, sway bars, control arms, tie rods, ball joints, bushings, chassis bracing, alignment hardware, air suspension, and complete stage kits from Bilstein, KW, Ohlins, Fox, KING, ICON, BC Racing, Silvers, Eibach, H&R, Swift Springs, Whiteline, Energy Suspension, Moog, SPC Performance, Rough Country, ReadyLIFT, BDS, Skyjacker, Air Lift, Firestone, and Black Ops Auto Works. Start with a matched shock and spring package or a full coilover kit, then layer in sway bars, chassis bracing, and camber adjustment hardware. Every part is filterable by year, make, model, trim, and drivetrain to confirm fitment before ordering. What This Category Covers Suspension is the highest-leverage handling upgrade on any vehicle. A properly matched shock, spring, and sway bar package produces measurable i...