H&R 51659-88 Sport Lowering Springs for 1999-2004 Ford Mustang Cobra V8 IRS

Vehicle Fitment

• 1999-2004 Ford Mustang Cobra (Convertible/Coupe; 4.6L/5.4L V8; IRS)

Features

• H&R Sport progressive-rate lowering springs engineered for enhanced handling
• Lowers center of gravity for improved stability and cornering response
• Reduces body roll compared with stock suspension
• Improves stance with reduced fender gap and sportier profile
• Precision wound from high-strength 54SiCr6 spring steel
• Shot-peened and stress-relieved for long service life
• Balanced performance and comfort for street driving
• Compatible with OEM or many aftermarket shocks/struts

Specifications

• Part Number: 51659-88
• Front Lowering Approx.: ~1.6 inches
• Rear Lowering Approx.: ~1.5 inches
• Material: 54SiCr6 high-tensile spring steel
• Fitment: Rear-wheel drive Mustang Cobra with independent rear suspension (IRS)
• Quantity: Set of 4 springs (front and rear)

Included Components

• 2x Front sport lowering springs
• 2x Rear sport lowering springs
• Manufacturer documentation

Product Description

H&R 51659-88 Sport Lowering Springs are designed specifically for 1999-2004 Ford Mustang Cobra models equipped with independent rear suspension (IRS). These sport springs lower the vehicle by approximately 1.6 inches in the front and about 1.5 inches in the rear, helping reduce the center of gravity and improve handling stability while maintaining a reasonable ride quality for street use. The lowered stance also enhances visual appeal with reduced fender gap and sharper posture.

Constructed from high-strength 54SiCr6 spring steel with a shot-peened, stress-relieved finish, these H&R Sport Springs offer durability and consistent performance. This kit includes a complete set of four springs and is compatible with many factory shocks as well as a wide range of aftermarket dampers, making it an excellent upgrade for Mustang Cobra owners seeking improved handling and a more aggressive stance without converting to a full coilover system.