JDM 2006 Civic Rear Suspension and Alignment Parts – A Complete Guide

The JDM 2006 Honda Civic, particularly the Si and Type R variants, is a favorite among enthusiasts for its balanced chassis and tunability. Upgrading the rear suspension and alignment components is one of the most effective ways to improve handling, tire wear, and overall driving feel. Whether you're building a track weapon, a daily driver with sharper reflexes, or a show car that sits just right, choosing the right rear suspension and alignment parts is crucial. This guide breaks down the options, explains what each part does, and helps you make informed decisions for your specific goals.

Understanding the 2006 Civic Rear Suspension Design

The JDM 2006 Civic (especially the FD2 Type R and the US-market Si) uses a fully independent rear suspension with a multi-link design. This setup allows separate control of camber and toe angles, which is great for handling but also means there are more points that can wear or need adjustment. Unlike the simpler torsion beam found on some lower-trim Civics, the multi-link system provides better tire contact and tuning potential. However, it also introduces complexity: worn bushings, bent arms, or incorrect alignment can quickly ruin the driving experience.

Multi-Link Setup (Si/Type R) vs. Non-JDM Variants

For the JDM 2006 Civic Si and Type R, the rear suspension consists of upper and lower control arms, a trailing arm (for some models), and stabilizer bar (sway bar) links. The alignment is adjusted via eccentric bolts on the lower control arm (camber) and tie rod ends (toe). Over time, factory rubber bushings wear out, causing slop and alignment drift. That's where aftermarket parts come in.

Common Rear Suspension Upgrades for JDM 2006 Civic

Adjustable Camber Arms

Factory upper or lower control arms are fixed length, so camber is only adjustable within a small range via stock eccentric bolts. Aftermarket adjustable camber arms allow you to set camber precisely, typically from -1° to -4° or more. This is essential if you lower the car (which adds negative camber) or if you want more aggressive camber for cornering. Look for arms with polyurethane or spherical bearings for better durability and less deflection under load.

Rear Control Arms and Bushings

The aluminum or steel control arms themselves are strong, but the bushings are the weak link. Replacing factory rubber bushings with polyurethane increases stiffness, reduces wheel hop, and improves steering response. Some enthusiasts swap the entire lower control arm for an adjustable version with built-in camber adjustment. Or you can use adjustable upper control arms if you want separate camber control. For track use, consider spherical bearings (helicoil or rod-end style) for maximum precision, but they can be harsh on the street.

Sway Bars and End Links

A thicker rear sway bar reduces body roll and induces more oversteer tendency, which many drivers prefer for a playful feel. Pair it with adjustable end links to eliminate preload and allow fine-tuning. Popular sizes are 19mm to 22mm for the rear. Solid end links (spherical) eliminate bushing slop and provide quicker response. Keep in mind that too stiff a rear bar can cause snapping oversteer, so match it to your spring rates and driving style.

Coilovers vs. Springs and Shocks

Coilovers (like those from Fortune Auto, BC Racing, or Tein) allow ride height and damping adjustment, plus they often include adjustable spring perches that provide some camber adjustability. For the street, a set of quality coilovers with Swift springs is a great choice. If you want to keep it simpler, lowering springs (such as Eibach Pro-Kit) with Koni Yellow shocks work well and maintain near-factory ride comfort. For track purposes, dedicated coilovers with higher spring rates and monotube dampers are recommended.

Alignment Parts You Need

Camber Kits

A camber kit for the rear typically consists of adjustable upper control arms or eccentric bushings. The JDM 2006 Civic uses a multi-link design, so you need either upper or lower arm adjusters. Eccentric bushings (like Enthuz car parts or Megan Racing) are inexpensive but offer limited range and can slip under load. Adjustable arms (like from GodSpeed, SPC, or Hardrace) give more range and are more secure. For mild lowering, a camber kit with polyurethane bushings is fine. For aggressive lowering or track use, get spherical bearing arms.

Toe Links and Alignment Adjustment

Toe adjustment is handled by the rear tie rod ends (toe links). Many aftermarket tie rod ends have heim joints (spherical ends) that provide zero deflection and allow precise toe settings. Adjustable toe arms (like from K-Tuned or Buddy Club) replace the factory non-adjustable ends. If you keep the factory toe adjusters, make sure they are not seized – a common problem on older cars. Use anti-seize during installation to prevent future rust.

Choosing the Right Parts for Your Driving Style

Street Performance

If you daily drive your Civic and want sharper handling without sacrificing comfort, go with a mild set of coilovers (adjustable damping, moderate spring rates) or performance springs and shocks. Add a 22mm rear sway bar with poly bushings, and replace the lower control arm bushings with polyurethane. For alignment, get a set of adjustable upper camber arms (e.g., SPC) to correct camber after a 1-1.5 inch drop. Set camber to around -1.5° front and -1.0° rear for good response and even tire wear. Toe should be 0° or slightly toe-in (0.05° per side) for stability.

Track and Autocross

For serious performance, choose coilovers with spherical bearings, adjustable camber arms with heim joints, and solid end links. A stiffer rear sway bar (21-22mm) and upgraded rear toe arms help fine-tune rotation. Aim for -2.5° to -3.5° rear camber to improve corner exit grip, with zero toe. Consider upgrading the rear subframe bushings to reduce arm flex. Parts from Hardrace, Buddy Club, and Password JDM are popular.

Lowered or Stanced

If your goal is aesthetics and static lows, you'll need maximum adjustment range. Get adjustable upper or lower camber arms that can handle -4° to -6° of camber. For toe, adjustable toe arms are a must. Be aware that excessive negative camber wears the inside of the tire quickly, and the car may feel twitchy. Alignment should be calibrated carefully to maintain drivability.

Installation Considerations and Tips

Installing rear suspension parts is intermediate-level work. You'll need basic tools: jack stands, a pry bar, torque wrench, and possibly an alignment rack afterwards. Some tips:

• Soak bolts in penetrating oil the day before to avoid breakage.
• When replacing control arms, transfer the ABS sensor bracket carefully.
• Use a torque wrench for all fasteners; follow manufacturer specs.
• After installation, get a professional alignment – the car will need it.
• If you install adjustable arms, set them to match the stock length before removal to get close to original alignment.

Final Recommendation

For most JDM 2006 Civic owners, a balanced setup starts with adjustable camber arms (upper or lower, depending on budget), a set of polyurethane bushings, and a mild rear sway bar upgrade. Pair that with quality coilovers like BC Racing ER series or Tein Flex Z, and you'll have a car that handles better than new without breaking the bank. If you track frequently, opt for spherical bearing components and a more aggressive alignment. For daily duties, stick with polyurethane bushing arms to keep noise manageable. Always prioritize proper alignment after any suspension work – it's the key to making all those parts work together.

Remember, the best parts are the ones that match your goals, budget, and willingness to tune. The JDM 2006 Civic's rear suspension is capable; with the right parts, it becomes exceptional.