Understanding Suspension Upgrades

Your Acura RSX Type S is already a capable front-wheel-drive sports coupe, but its true potential is often limited by the factory suspension. The stock setup is tuned for a balance of comfort and moderate performance, leaving room for significant improvement in cornering grip, steering response, and overall confidence. Upgrading the suspension involves replacing or reinforcing key components that control how the car’s weight transfers during acceleration, braking, and turns. The main components to consider include coilovers, shock absorbers, sway bars, and strut braces. Each plays a distinct role: coilovers and shocks handle spring rate and damping, sway bars reduce body roll, and strut braces stiffen the chassis. Understanding how these parts interact is essential to building a suspension that suits your driving style—whether that’s daily driving, autocross, or track days.

Before diving into parts, it’s important to assess your goals and budget. A budget of $500–$1,500 can cover a meaningful upgrade, but the final result depends on which components you prioritize. For example, spending the entire budget on a set of high-end coilovers without addressing sway bars may leave body roll unmanaged, while a balanced mix of mid-range parts could deliver a more cohesive feel. This guide breaks down the costs, benefits, and trade-offs of each component to help you plan an effective suspension upgrade for your RSX Type S.

Key Suspension Components and Their Costs

1. Coilovers

Coilovers are the most popular suspension upgrade for the RSX Type S because they combine a spring and shock absorber into a single unit with adjustable ride height and often damping. This allows you to lower the car’s center of gravity, reduce body roll, and fine-tune the suspension to your preferred stiffness. Quality coilovers also provide better damping control than factory shocks, improving wheel traction over bumps and during aggressive cornering. Prices vary widely:

  • Budget Options ($500–$700): Brands like BC Racing BR series or Tein Street Basis offer basic height and damping adjustment. They provide a noticeable improvement over stock but may use less durable materials and have a stiffer ride.
  • Mid-Range Options ($700–$1,000): These include BC Racing ER series, Tein Flex Z, or KW Variant 1. They offer better build quality, more adjustability, and improved ride comfort compared to budget models.
  • High-End Options ($1,000–$1,500): Upper-tier coilovers like KW Variant 3 or Öhlins Road & Track feature independent rebound and compression damping, high-quality springs, and corrosion-resistant bodies. These are suitable for track use and provide the best balance of comfort and performance.

When selecting coilovers, consider your street versus track usage. Aggressive spring rates (e.g., 10k/12k) improve handling but can be harsh on rough roads. A spring rate around 7k/8k is often recommended for a street-driven RSX Type S with occasional autocross.

2. Shock Absorbers

If you want to retain factory springs but improve damping, upgrading shock absorbers is a cost-effective alternative to full coilovers. Higher-quality shocks (also called dampers) control oscillation more precisely, reducing bounce and improving tire contact with the road. This upgrade is especially popular for RSX owners who want a sportier feel without lowering the car. Costs are:

  • Basic Shock Absorbers ($200–$400): These are typically direct replacements for worn factory units, offering slightly improved performance. They are not adjustable but can restore handling to like-new condition.
  • Performance Shock Absorbers ($400–$800): Brands like Koni Yellow Sport or Bilstein B6 provide adjustable rebound damping. They pair well with factory springs or aftermarket lowering springs (e.g., Neuspeed or Eibach Pro-Kit). For example, Koni Yellows with Eibach Pro springs can be a budget-friendly combo that significantly reduces body roll and improves turn-in response.

One advantage of shocks over coilovers is lower installation complexity and the ability to keep the factory ride height, which can be beneficial for daily driving on rough roads or steep driveways.

3. Sway Bars

Sway bars (anti-roll bars) connect the left and right suspension components to reduce body roll during cornering. A stiffer sway bar transfers more load to the inside wheel, improving cornering stability and reducing the tendency for the rear to slide out. On an RSX Type S, upgrading the rear sway bar is particularly effective because the car comes with a relatively small factory bar (22mm front, 14mm rear). Common upgrades include:

  • Front Sway Bar ($150–$300): Upgrading the front sway bar to 25mm or thicker reduces understeer but can increase nose push if too stiff. Many enthusiasts stick with a stock front bar or a modest upgrade.
  • Rear Sway Bar ($150–$300): A 22mm–24mm adjustable rear sway bar (e.g., from Progress or Eibach) is one of the best single-handling upgrades for the RSX. It reduces understeer, allows the car to rotate more easily through corners, and feels more neutral.

Typically, a rear sway bar upgrade alone can transform handling for under $300. If you install both front and rear, consider adjustable links to fine-tune preload. Many RSX owners report a much more playful and responsive feel with just a rear sway bar and good tires.

4. Strut Braces

Strut braces tie the top of the front (or rear) strut towers together, increasing chassis rigidity. On an RSX, the front strut brace is more effective because it connects the two front suspension towers where the most flex occurs. A stiffer chassis improves steering precision, especially during hard cornering on uneven surfaces. Costs are:

  • Front Strut Brace ($100–$200): Brands like Neuspeed or Ultra Racing offer bolt-on front braces. Some require trimming of the factory plastic shroud for clearance.
  • Rear Strut Brace ($100–$200): Less common, but some RSX owners install a rear brace (often behind the back seat) to reduce chassis flex further. Gains are subtle compared to the front brace.

Strut braces are inexpensive and easy to install. They work best in combination with other upgrades like coilovers and sway bars. A common setup is a front strut brace plus rear sway bar—total cost under $500 for noticeable improvement.

Installation Considerations and Costs

Unless you have experience with suspension work, professional installation is recommended. However, some components are easier to DIY than others. Sway bars and strut braces are relatively straightforward—typically requiring only jack stands, wrenches, and basic hand tools. Coilovers and shock absorbers are more involved, requiring spring compressors and alignment afterward. Here’s a breakdown of typical labor costs if you choose to hire a shop:

  • Basic Installation (shocks, strut braces, or sway bars): $100–$300. This assumes a straightforward swap without additional work like replacing bushings or worn hardware.
  • Advanced Installation (coilovers, sway bars, and strut braces): $300–$600. If you’re having a full suspension overhaul including multiple components, expect higher labor charges. Some shops include a basic alignment with spring/strut installations.
  • Alignment (post-installation): $80–$150. After any suspension change that affects ride height or camber, a four-wheel alignment is essential to ensure tire wear and handling. Coilovers often require camber adjustments, which may cost extra if aftermarket camber arms are needed.

If you DIY, invest in a quality spring compressor and a torque wrench. Also, be prepared to replace worn bushings and hardware (especially the lower control arm bolts, which can seize). Factor in about $50–$100 for incidental supplies like replacement bolts, lubricants, and alignment after you do the work yourself.

Performance Gains: What to Expect

Upgrading your RSX Type S suspension from stock yields measurable improvements:

  • Reduced Body Roll: Sway bars and stiffer springs cut body roll by 30–50%, allowing you to carry more speed through corners. The car feels flatter and more stable.
  • Better Steering Response: Coilovers or performance shocks reduce the delay between steering input and the car’s reaction. A front strut brace further sharpens turn-in.
  • Increased Cornering Grip: With less body roll, the tires maintain a better contact patch. Combined with good performance tires, an upgraded RSX can achieve 0.95–1.0g on skidpad (vs. ~0.88g stock).
  • Adjustability: Coilovers allow you to dial in ride height and damping for different conditions—softer for daily driving, stiffer for track days. This flexibility is a major advantage over fixed-spring/shock combos.
  • Lower Center of Gravity: Lowering the car 1–1.5 inches (common with coilovers) reduces weight transfer, improving acceleration and braking stability.

Note that these gains come with trade-offs: a stiffer suspension will transmit more road harshness, and lowering can reduce ground clearance. Consider your local roads and driving priorities before choosing aggressive spring rates or extreme lowering.

Total Cost Scenarios

Below are three realistic upgrade scenarios within your $500–$1,500 budget. Prices include parts and professional installation (where applicable). Alignment costs are not included unless stated.

Scenario 1: Basic Handling Boost (~$500–$800)

  • Rear sway bar (22mm adjustable) – $250
  • Front strut brace – $150
  • Installation (DIY or shop labor for sway bar + brace) – $0–$200
  • Alignment – $100
  • Total: $500–$700

This is the best bang-for-buck upgrade. You’ll reduce body roll and improve steering feel without changing ride height or harshness. If you DIY, you can stay under $500.

Scenario 2: Balanced Street/Track Upgrade (~$1,000–$1,400)

  • Mid-range coilovers (e.g., BC Racing BR or Tein Flex Z) – $850
  • Rear sway bar (optional) – $250
  • Installation (coilovers + sway bar) – $400
  • Alignment – $100
  • Total: $1,600 (exceeds $1,500 by $100; you can skip the sway bar to keep it under budget: $1,350)

This setup provides adjustable height/damping and a rear sway bar for a well-balanced handling package. If you do the sway bar yourself and accept a basic alignment, you can keep total under $1,500.

Scenario 3: Premium Street/Track Build (~$1,500)

  • High-end coilovers (e.g., KW Variant 1 or Öhlins R&T) – $1,400
  • Rear sway bar – $250 (DIY install) – $50 in tools – total $300
  • Alignment – $100
  • Total: $1,800 (over $1,500; to stay within budget, choose mid-range coilovers instead)

To stay at the $1,500 cap, opt for top-tier coilovers alone (skip the sway bar) or go with mid-range coilovers plus a rear sway bar. This demonstrates that $1,500 can buy either very good coilovers or a well-rounded combination of parts.

If you already have good tires, allocate budget toward coilovers first, then sway bar, then strut brace. Tires are the single most influential performance upgrade—if your rubber is old or hard, even the best suspension won’t realize its full potential.

Conclusion

Upgrading the suspension on your RSX Type S is one of the most effective ways to enhance driving enjoyment and performance. With a budget of $500 to $1,500, you can achieve significant improvements by choosing the right combination of components. Whether you start with a simple rear sway bar and strut brace or invest in a full set of coilovers, each upgrade brings you closer to the car’s true potential. Remember to factor in installation, alignment, and possibly new tires to maximize your investment. For further reading, consult resources like the Club RSX community for owner experiences, or check Tire Rack for product reviews. A well-sorted suspension transforms the RSX Type S from a quick daily driver into a precision corner-carving machine.