Hellcat Performance Suspension Parts Upgrade: What You Need to Know

Upgrading the suspension on your Dodge Challenger or Charger Hellcat can transform the driving experience. While the factory suspension is capable, it's tuned for a balance of comfort and performance. A dedicated upgrade focused on handling can reduce body roll, improve steering response, and increase cornering grip. This guide covers the key components—coilovers, sway bars, control arms, and bushings—and offers practical advice for selecting the right parts for your goals.

Why Upgrade Your Hellcat’s Suspension?

The Hellcat’s stock suspension is a compromise. To keep maintenance costs low and ride quality acceptable for daily driving, engineers used relatively soft springs and dampers, and compliant rubber bushings. The result is a car that can accelerate and brake impressively but leans heavily in corners, feels vague in quick transitions, and exhibits wheel hop under hard acceleration. Upgrading addresses these issues, giving you more confidence at autocross, track days, or even aggressive street driving.

Key Performance Suspension Components

Coilovers

Coilovers replace the stock strut and spring assembly with a combination of adjustable dampers and height-adjustable springs. They are the most effective single upgrade for overall handling. When choosing coilovers, consider:

• Adjustability: Look for both rebound and compression damping adjustability. This allows you to fine-tune ride quality and cornering balance. Some units also offer camber plates up front, which are essential for negative camber to improve turn-in and cornering grip.

• Spring Rate: Higher spring rates reduce body roll and pitch. For street use, rates around 300–400 lb/in in front and 200–300 lb/in in the rear work well. If you track the car often, you may want stiffer springs.

• Ride Height: Lowering the center of gravity improves handling, but going too low can cause bottoming out or damage to oil pans. A 1–2 inch drop is typical.

Sway Bars (Anti-Roll Bars)

Sway bars connect the left and right sides of the suspension to reduce body roll in turns. A thicker front bar reduces understeer; a thicker rear bar reduces oversteer. For a balanced setup on a Hellcat, consider:

• Adjustable sway bars: These have multiple mounting holes to change the effective stiffness. A common upgrade is a 36 mm front and a 28 mm rear bar. This combination tightens up the car without making it too tail-happy.

• End Links: Upgraded end links (preferably adjustable) remove slop from the suspension links, improving responsiveness.

Control Arms and Bushings

Stock control arms use rubber bushings that deflect under load, causing imprecision. Upgraded arms with polyurethane or spherical bearings reduce deflection, allowing the suspension to maintain geometric control. Key benefits:

• Front Lower Control Arms: Adding adjustable lower control arms (LCA) allows you to dial in caster and camber. More caster improves straight-line stability and steering feel.

• Rear Upper and Lower Arms: Adjustable rear arms let you set pinion angle and correct toe, which is critical for eliminating wheel hop during hard launches.

• Bushing Kits: If budget is tight, replacing only the bushings with polyurethane can tighten up the chassis without buying entire arms. However, spherical bearings offer the least compliance for maximum precision but transmit more road noise.

Shocks and Struts

If coilovers are not in your plan, upgraded shocks and struts paired with aftermarket lowering springs can be a cost-effective upgrade. Look for monotube designs with better heat dissipation than the stock twin-tube units. Brands like Bilstein and Koni offer direct-fit options with adjustable damping.

Subframe Mounts and Cradle Inserts

The rear subframe in Hellcats has large rubber biscuits that allow movement under load. Upgraded subframe bushings or billet inserts reduce deflection, improving rear-end stability during acceleration and cornering. This is a common fix for wheel hop.

How to Choose the Right Parts

• Determine Your Use Case: Are you daily driving, weekend tracking, or drag racing? For a daily driver that sees occasional canyon runs, a set of adjustable coilovers and a front sway bar upgrade will go a long way. For dedicated track use, add rear arms and stiffer bushings.

• Set a Budget: A full suspension build can cost $2,000–$5,000+. Prioritize parts that address your main complaint. If wheel hop is your biggest issue, start with subframe bushings and lower control arms. If body roll bothers you most, begin with coilovers and sway bars.

• Check Compatibility with Factory Features: Some Hellcat models have electronic damping (Adaptive Damping Suspension). If yours has that, you cannot just swap in standard coilovers unless you bypass the system or use specific coilovers designed to work with the factory electronics.

• Consider Installation Complexity: Coilovers and sway bars are DIY-friendly with basic tools. Control arms and bushing replacements often require a press and professional alignment. Factor in labor costs if you don't have the equipment.

Brands to Consider

• KW / ST Suspensions: Known for high-quality coilovers with excellent damping characteristics. The KW V3 is a popular choice.

• Eibach: Offers progressive springs and adjustable sway bars that pair well with stock or upgraded dampers.

• BMR Suspension: Specializes in Hellcat-specific control arms, subframe connectors, and bushings. Their rear LCAs are great for wheel hop.

• DSS (Dodge Street Systems): A trusted brand for braces, sway bars, and complete handling packages.

• Hotchkis: Their Sport Suspension system includes sway bars and springs tuned together for balanced handling.

Installation and Alignment Tips

• Proper Alignment is Crucial: After any suspension work, get a professional alignment with specs tailored to performance. A common alignment for Hellcats is: Front camber -1.5 to -2.0 degrees, rear camber -1.0 degrees, and 0 toe front and rear.

• Break-In Period: New bushings and springs may settle after a few hundred miles. Re-torque all fasteners after 500 miles.

• Stiffness vs. Ride Quality: Increasing stiffness always reduces comfort. Be honest about your tolerance for a harsh ride. Polyurethane bushings add noise and vibration. Spherical bearings are even more extreme.

Final Recommendation

For a well-rounded upgrade on a daily-driven Hellcat, start with a set of adjustable coilovers (like KW V3 or comparable) and a front sway bar. This combination cuts body roll, lowers the center of gravity, and improves steering response without making the car unbearable on the street. If wheel hop persists, add rear lower control arms with polyurethane bushings. For track-focused builds, invest in full adjustable control arms, stiffer springs, and spherical bushings. Always budget for a professional alignment and consider installation costs if you’re not handy. The right suspension upgrade makes your Hellcat not only faster in corners but also more predictable and fun to drive hard.