Upgrading your vehicle's suspension with custom parts is one of the most effective ways to improve handling. Whether you're looking to reduce body roll, sharpen turn-in response, or achieve a more planted feel on rough roads, the right suspension components can transform your driving experience. This guide covers the key types of custom suspension parts, how they affect handling, and what to consider when making a purchase.
Shop on Amazon
Browse the latest options and prices.
SCITOO 14pcs Suspension Kit For 1978-1996 For Impala 1978-1996 Caprice 1978-1990 For LeSabre 1978-19
Understanding Suspension Geometry and Handling
Before diving into specific parts, it helps to understand how suspension affects handling. The suspension system controls the relationship between the tires and the road. Key factors include spring rate, damping, ride height, and alignment angles (camber, caster, toe). Custom parts allow you to adjust these parameters beyond factory settings, resulting in more predictable and responsive behavior.
Coilovers: The Foundation of Handling
Coilovers combine a coil spring and shock absorber into a single unit, often with adjustable ride height and damping. They are popular because they offer a comprehensive upgrade.
Benefits of Coilovers
- Height Adjustability: Lowering the center of gravity reduces body roll and improves cornering stability. You can also raise the car for snow or rough roads.
- Damping Control: Many coilovers have adjustable compression and rebound damping. Softer settings improve comfort, stiffer settings reduce pitch and dive under braking and acceleration.
- Spring Rate Options: Aftermarket coilovers typically offer higher spring rates than stock, reducing squat and dive.
What to Look For
When choosing coilovers, consider the construction (monotube vs. twin-tube), materials (aluminum vs. steel), and whether they are street-focused or track-oriented. Brands like KW, Bilstein, and Ohlins offer reliable options. For daily driving, look for adjustable damping and reasonable ride quality. For dedicated track use, stiffer springs and race-oriented valving may be preferable.
Sway Bars (Anti-Roll Bars)
Sway bars connect the left and right sides of the suspension and resist body roll during cornering. Upgrading front and rear sway bars is one of the most cost-effective handling improvements.
How They Help
Thicker or stiffer sway bars reduce body roll, allowing the tires to maintain better contact with the road. This results in quicker transitions and more confidence in corners.
Adjustability
Many aftermarket sway bars have multiple mounting holes for the end links, allowing you to fine-tune roll stiffness. Stiffer front bars reduce understeer, stiffer rear bars reduce oversteer. Choose a kit that matches your driving style and vehicle.
Control Arms and Bushings
Factory control arms and rubber bushings have a lot of compliance, which introduces slop and vague steering feel. Upgrading to adjustable or stiffer components sharpens response.
Adjustable Control Arms
These allow you to set camber and caster angles beyond OEM ranges, which is especially useful after lowering the car. Correct alignment after lowering prevents uneven tire wear and maximizes grip.
Polyurethane or Spherical Bushings
Polyurethane bushings are stiffer than rubber, reducing deflection and improving steering precision. Spherical bearings (heim joints) offer even more direct feedback but can introduce noise and vibration. For a street car, polyurethane is a good compromise.
Springs and Shocks Separately
If you want to keep your existing struts or shocks, upgrading only the springs and dampers is an option. This is often less expensive than coilovers.
Performance Springs
Lowering springs drop the car about 1-1.5 inches while increasing spring rate. They reduce body roll but may not match your factory dampers, leading to a bouncy ride. Pair with sport shocks for best results.
Sport Shocks and Struts
Replacing worn shocks with performance-oriented units (e.g., Koni Yellow, Bilstein HD) improves damping control and ride quality. Many are adjustable or valved for specific spring rates.
Strut Bars and Chassis Braces
Strut tower bars and chassis braces tie the suspension mounting points together, reducing flex under cornering loads. This improves steering response and consistency, especially on unibody cars.
Where to Install
Common braces include front strut bar, rear strut bar, and lower tie bars. They work best when combined with stiffer bushings and springs. For street driving, a front strut bar is usually sufficient.
Factors to Consider Before Buying Custom Suspension Parts
Your Driving Goals
Define what “better handling” means to you: daily driving comfort, autocross, track days, or canyon carving? This determines the level of stiffness and adjustability you need.
Vehicle Compatibility
Not all parts fit all cars. Research forums or manufacturer websites to find components designed for your specific make and model. Some cars have limited options.
Budget
Quality suspension parts range from a few hundred to several thousand dollars. A good entry-level setup is a set of quality lowering springs and sport shocks (around $600-$1,000). Mid-range coilovers ($1,000-$2,500) offer more adjustability. High-end racing setups can exceed $4,000.
Installation and Alignment
Some parts, like sway bars, can be installed at home with basic tools. Others, like coilovers and control arms, require professional installation and a proper alignment afterward. Factor in labor costs.
Legal Considerations
Extreme lowering or stiffening may affect legality for street use. Check local regulations regarding ride height and modifications.
Practical Final Recommendation
If you’re looking for the single biggest improvement in handling for a daily driver, start with a front sway bar and a set of high-quality performance shocks or coilovers with adjustable damping. This combination reduces body roll, improves steering feedback, and maintains reasonable ride comfort. For more dedicated use, add adjustable control arms to dial in alignment and polyurethane bushings to eliminate slop.
Always prioritize quality over price—cheap components often fail or degrade handling. Buy from reputable manufacturers and have the work done by a shop experienced with aftermarket suspension. Test the setup on familiar roads to feel the difference, and don't be afraid to adjust settings (if adjustable) to suit your preferences. With the right parts and proper installation, custom suspension can make your car handle like it was built for the track, while still being enjoyable on the street.