AST Suspension BMW M5 G99 Adjustable Lowering Springs

This AST Suspension BMW M5 G99 Adjustable Lowering Springs is a vehicle-specific adjustable lowering spring set. Match the exact chassis, drivetrain, body style, factory damper or air-suspension configuration, adjustment range, and every application note before ordering.

Key Features

• Adjustable Height: Threaded perches deliver 10-30mm front and 20-45mm rear drop for custom stance and alignment adjustments.
• Chrome Silicon Steel: High-tensile progressive wound construction resists sagging under high-speed track loads.
• Linear Spring Rates: Front 6.8 kg/mm rear 11.2 kg/mm ensure balanced response and comfort matching OEM ride quality.
• Direct Fitment: Engineered for BMW M5 G99 OEM strut mounts requires no additional hardware.
• Corrosion Resistant: Dual-layer powder coat and e-coat finish protects against road salt and harsh conditions.
• Ships fully assembled ready for install weight 22.5 lbs.

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
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• AST Suspension BMW M5 G90 Adjustable Lowering Springs
• AST 01/1988-03/1997 BMW 5 Lowering Springs – 35mm/35mm

Frequently Asked Questions

How do I confirm the correct adjustable spring kit?
Match the exact vehicle, chassis, drivetrain, body style, factory damper or air-suspension setup, axle configuration, and AST part number.

Can ride height be changed after installation?
The supplied adjustment hardware is designed to fine-tune ride height within the stated range. The vehicle must be safely supported and the current AST procedure followed.

Will the vehicle need an alignment?
Yes. Settle and measure the final ride height, then align the vehicle and verify suspension, tire, wheel, and brake-line clearance through full travel.

Does the kit replace the factory dampers?
Not unless the exact listing expressly includes dampers. Adjustable lowering spring kits normally retain the compatible damper arrangement identified for that part number.

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.