The Complete Guide to RSX Suspension Parts: Upgrades and Replacements

If you own an Acura RSX, you know it’s a sporty compact car that rewards good suspension. Whether you’re refreshing worn parts or upgrading for autocross, choosing the right RSX suspension parts matters. This guide covers the main components, what to look for, and how to match them to your driving style.

Understanding Your RSX Suspension

The RSX uses a front MacPherson strut and rear dual-link setup. Over time, bushings wear, struts leak, and springs sag. Upgrading can improve handling, ride quality, or both. The key is knowing which parts work together.

Struts and Shocks

Struts are a structural part of the front suspension; shocks are used in the rear. For daily driving, OE replacements from KYB or Monroe restore original feel. For performance, consider adjustable dampers. Tokico and Koni make direct-fit options that let you tweak rebound stiffness. If you lower the car, get shorter-stroke dampers to avoid bottoming out.

Coilovers

Coilovers combine spring and damper into one unit, often with ride-height adjustment. They’re popular for lowering and improving cornering. For street use, look for a coilover with a spring rate around 6-8 kg/mm front and 5-7 kg/mm rear. Brands like BC Racing, Tein, and Ksport offer RSX-specific kits with camber adjustment. Avoid overly stiff setups for daily driving.

Springs

If you want a mild drop without replacing struts, lowering springs are an option. They lower the car 1-1.5 inches and increase spring rate. Eibach Pro-Kit and H&R Sport springs pair well with stock shocks, but expect a firmer ride. For track use, consider stiffer springs with a matched damper.

Sway Bars

Sway bars reduce body roll. A thicker rear bar (like 22mm) helps rotate the car in corners. Whiteline and Progress make adjustable bars. Pair with stiffer end links for best response. Don’t oversize the front bar unless you want understeer.

Control Arms and Bushings

Stock rubber bushings flex, causing vague steering. Polyurethane bushings from Energy Suspension or Whiteline tighten up the front lower control arms and rear trailing arms. Adjustable rear camber arms are essential if you lower the car more than 1.5 inches, as the RSX gains excessive negative camber. SPC and Godspeed make affordable arms.

Factors to Consider When Buying RSX Suspension Parts

Driving Style

• Daily commute: Replace worn parts with OE quality. Focus on comfort and longevity.
• Spirited backroads: Upgrade to coilovers or performance struts and springs. Keep some compliance.
• Autocross or track: Go for full adjustability: coilovers, camber plates, stiffer bushings, and a big rear sway bar.

Budget

OE replacements cost $200-$500 for a full set. Entry-level coilovers run $500-$800. Mid-range adjustable dampers and springs are $600-$1000. Top-tier setups exceed $1500. Set a budget and prioritize the parts that give the biggest improvement for your use.

Compatibility

Most 2002-2006 RSX parts are interchangeable between base and Type-S, but check brake clearance and shock tower differences. Type-S has slightly different spring rates and a rear sway bar. Always confirm part numbers for your specific model year.

Installation Tips

• Replace struts and shocks in pairs (both front or both rear).
• When installing coilovers, preload the spring slightly and use a spring compressor.
• After lowering, get an alignment immediately. Set camber to -1.5° to -2.0° front and -1.0° to -1.5° rear for street use.
• If you install adjustable camber arms, tighten bolts with the suspension loaded (on the ground).

Maintenance and Longevity

• Check coilovers for leaks annually. Clean adjuster knobs with contact cleaner.
• Polyurethane bushings need lubrication every few years to prevent squeaking.
• Inspect ball joints and tie rod ends when replacing suspension parts. A worn tie rod will ruin your alignment.

Final Recommendation

For most RSX owners, a balanced upgrade is: replace worn struts with Koni Yellow dampers, add Eibach Pro-Kit springs, and install a 22mm rear sway bar with polyurethane end links. This sharpens handling without ruining ride quality. If you want lower and more adjustability, spend on quality coilovers like BC Racing BR Series. Avoid cheap no-name parts; suspension is safety-critical. Always buy from reputable dealers and verify fitment before purchase.