Ride Height Drop

Designed to create a refined sport sedan stance while preserving practical ground clearance.

The balanced ride height improves the vehicle’s appearance while lowering the center of gravity for more confident handling.

Progressive Spring Technology

TruHart utilizes a progressive-rate spring design that is approximately 20% stiffer than factory springs.

Benefits include:

• Improved steering response
• Reduced body roll
• Better cornering stability
• Improved suspension control
• Comfortable everyday ride
• Increased driver confidence

The progressive design allows the suspension to remain compliant during daily driving while providing additional support under heavy cornering and braking.

Premium 55 Chrome Silicon Spring Steel

Every TruHart spring is manufactured using premium 55 chrome silicon spring steel.

Construction highlights include:

• Cold-wound 55 chrome silicon steel
• Precision spring manufacturing
• Heat-treated construction
• Corrosion-resistant finish
• ISO 9001 certified production
• TÜV-approved manufacturing facility

The high-strength material provides exceptional fatigue resistance while maintaining consistent ride height throughout years of use.

Improve Sonata & K5 Handling

Lowering your Sonata or K5 delivers noticeable improvements in both appearance and driving dynamics.

Performance benefits include:

• Lower center of gravity
• Reduced body roll
• Improved steering precision
• Better cornering grip
• Reduced brake dive
• Reduced rear squat
• Improved highway stability
• More aggressive sport sedan stance

Whether commuting or enjoying a winding road, the vehicle feels more responsive and planted.

Designed for Daily Driving

Although these springs noticeably improve handling, they remain comfortable enough for everyday driving.

Drivers can expect:

• Smooth highway ride
• Improved suspension balance
• Better road feel
• Reduced chassis movement
• Comfortable daily commuting

The progressive spring design delivers sporty performance without creating excessive ride harshness.

Compatible with OEM and Aftermarket Shocks

TruHart lowering springs are designed to work with:

• Factory Hyundai and Kia shocks
• TruHart Sport Shocks
• OEM replacement dampers
• Performance aftermarket shocks

While factory shocks remain compatible, TruHart Sport Shocks or performance dampers provide the best suspension performance.

Installation Information

Estimated Installation Time

2-4 hours

Professional installation is recommended.

Following installation:

• Perform a professional four-wheel alignment.
• Inspect upper strut mounts and suspension bushings.
• Verify wheel and tire clearance.
• Re-torque suspension hardware after break-in.

Technical Specifications

Frequently Asked Questions

Will these fit my 2022 Hyundai Sonata N Line?

Yes. These springs are compatible with gasoline-powered 2020-2022 Sonata models, including the N Line.

Will they fit the 2023 Kia K5 GT-Line?

Yes. They are designed for front-wheel-drive 2021-2023 Kia K5 models, including the GT-Line.

Will these fit Hybrid or AWD models?

No. These springs are not compatible with Sonata Hybrid or AWD-equipped Kia K5 models.

Can I use factory shocks?

Yes. TruHart lowering springs are fully compatible with OEM shocks, although TruHart Sport Shocks or other performance dampers are recommended for the best ride quality and handling.

Is an alignment required?

Yes. A professional four-wheel alignment should always be performed after lowering your vehicle.

Why Buy From Pro Street Online?

At Pro Street Online, we know modern sport sedans deserve suspension upgrades that improve both performance and everyday drivability. We carry enthusiast-trusted suspension components backed by knowledgeable support, helping you build a Sonata or K5 that looks as good as it drives.