AST BMW 2018+ M340 (G20) Lowering Springs 30mm drop

This AST Suspension BMW 2018+ M340 (G20) Lowering Springs 30mm drop is a vehicle-specific lowering spring set selected by exact part number, chassis, drivetrain, body style, suspension configuration, and stated front and rear drop. Confirm every application note before ordering.

Key Features

• Precise Drop Amounts: 35mm front 30mm rear lowering achieves aggressive stance enhances aerodynamics boosts handling precision without excessive harshness.
• Wafios Cold-Coiling: Manufactured on premium Wafios machines using high-tensile chrome-silicon steel for consistent rates maximum durability and sag resistance.
• Progressive Rate Design: Variable coil pitch absorbs impacts smoothly during street driving firms up under load for track-capable control.
• High-tensile chrome-silicon steel with progressive rates front approximately 450-550 lb/in rear 350-450 lb/in tuned for balance.
• Vehicle-Specific Development: Engineered exclusively for BMW M340i B58 platform ensures perfect fit OEM compatibility and balanced dynamics.
• Direct bolt-on retains all OEM mounts top hats bump stops and hardware.

Fitment

Specifications

What’s Included

One new AST Suspension product in the exact part number, dimensions, rate, adjustment specification, and quantity identified on this page. Springs, dampers, top mounts, reservoirs, adjusters, links, tools, lines, fittings, and hardware are included only when expressly stated for this exact configuration.

About AST Suspension

AST Suspension develops performance springs, dampers, coilovers, top mounts, and motorsport suspension components. Vehicle fitment, dimensions, rates, adjustment functions, and included components remain exact-part specific.

Related Parts

• Shop the complete AST Suspension collection
• Shop suspension components
• AST Suspension 2019+ BMW M340i XDRIVE Lowering Springs 30mm/30mm
• AST 00-09/06 BMW M3 Lowering Springs – 30mm/20mm
• AST 01/1985-05/1995 Mercedes-Benz 200-Series Lowering Springs – 40mm/40mm

Frequently Asked Questions

How do I confirm these springs fit my vehicle?
Match the exact year, make, model, chassis, drivetrain, body style, engine, factory suspension, axle-load notes, and AST part number.

Will I need an alignment after installing lowering springs?
Yes. Measure ride height after the springs settle, then perform a complete alignment and verify tire, wheel, brake-line, and suspension clearance.

Can these springs be used with factory dampers?
Only when the exact AST application permits it. Check damper condition, available travel, bump-stop requirements, and every product-specific suspension note.

Is the advertised drop exact on every vehicle?
The stated drop is a target for the listed configuration. Actual ride height can vary with equipment, vehicle weight, spring isolators, damper condition, and prior suspension changes.

Installation Instructions

1. Confirm the exact AST part number, complete application or dimensional specification, included components, and current instructions before disassembly.
2. Support the vehicle at approved points and record the original ride height, alignment, suspension orientation, and adjustment settings.
3. Install components in the specified position and sequence using correct spring-compression, torque, preload, ride-height, and damper setup procedures.
4. Verify full suspension and steering travel, tire and wheel clearance, brake-line routing, fastener torque, and damper operation.
5. Settle the suspension, measure final ride height, complete a professional alignment, and recheck the installation after the initial driving cycles.