This AST Suspension 2004-05/2011 Chrysler 300C Lowering Springs – 30mm 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

• 30mm Drop Height: Lowers front and rear for improved aerodynamics stability and cornering grip without sacrificing daily drivability.
• Vehicle-Specific Development: Custom-tuned for Chrysler 300C and 300S models ensuring bolt-on fit with no modifications needed.
• Progressive Spring Design: Varies spring rates to absorb bumps smoothly while providing firmer control during aggressive maneuvers.
• Yes fits 2005-2011 Chrysler 300C and 2010 300S as direct OEM replacements with 30mm drop front and rear.
• Reuse OEM upper strut mounts and hardware for straightforward swap.
• Precise engineering delivers balanced lowering and ride quality.

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 2004-05/2011 Chrysler 300C Lowering Springs – 30mm
• AST 2004-11/2012 Chrysler 300C Lowering Springs – 30mm/30mm
• AST 2004-11/2012 Chrysler 300C 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 2004-05/2011 Chrysler 300C Lowering Springs – 30mm 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

• 30mm Drop Height: Lowers ride stance precisely while maintaining suspension travel and comfort levels from stock setup.
• Progressive Spring Rate: Delivers smooth initial compression for comfort then firms up for control in corners and bumps.
• Direct bolt-on installation with no vehicle modifications needed.
• Exact 30mm drop front and rear for lowered stance with retained suspension geometry.
• High-tensile spring steel coiled on professional Wafios machines for superior fatigue resistance.
• Spring compressor tool required for safe removal and install.

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 2004-05/2011 Chrysler 300C Lowering Springs – 30mm
• AST 2004-11/2012 Chrysler 300C Lowering Springs – 30mm/30mm
• AST 2004-11/2012 Chrysler 300C 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.