This AST Suspension 11/2020- BMW 4 Lowering Springs – 30mm/25mm 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: 30mm front 25mm rear lowering matches BMW 4 Series geometry for improved stability without harshness.
• Progressive Spring Design: Varies rates for smooth daily driving and firm cornering response under load.
• Vehicle-Specific Engineering: Developed exclusively for BMW 4 Series fitment ensuring bolt-on installation and factory alignment.
• Box dimensions 18 x 7 x 7 inches product weight 21 lbs.
• Direct fit with factory struts shocks and control arms no modifications needed.
• Yes ASTLS-22-124 fits all listed 2021-2024 BMW 4 Series Coupe Convertible and Gran Coupe submodels produced from 11/2020 including M440i xDrive with 30mm front 25mm rear drop.

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 03/2014-07/2021 BMW 4 Lowering Springs – 40mm/40mm
• AST 07/2013-10/2020 BMW 4 Lowering Springs – 40mm/40mm
• AST 07/2020- BMW 4 Lowering Springs – 30mm/30mm

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.

This AST Suspension 11/2020- BMW 4 Lowering Springs – 30mm/25mm 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: 30mm front and 25mm rear lowering tailored for BMW 4 Series to improve stance aerodynamics and cornering without sacrificing ride quality.
• Vehicle-Specific Development: Engineered exclusively for each BMW 4 Series model ensuring bolt-on fitment and no alignment issues.
• Progressive Spring Design: Balances firmness and compliance for responsive handling and OEM-like comfort across varied road conditions.
• Yes ASTLS-22-309 fits all 2021+ BMW 4 Series G22 G23 G26 including M440i xDrive Coupe with 30mm front 25mm rear drop.
• High-strength steel coiled on precision Wafios machines for corrosion resistance and longevity.
• Direct replacement for OEM springs no additional modifications required.

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 03/2014-07/2021 BMW 4 Lowering Springs – 40mm/40mm
• AST 07/2013-10/2020 BMW 4 Lowering Springs – 40mm/40mm
• AST 07/2020- BMW 4 Lowering Springs – 30mm/30mm

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.