2005 Acura TL A-Spec Suspension Parts: A Complete Guide

The 2005 Acura TL A-Spec suspension package remains a popular upgrade for enthusiasts seeking sharper handling without sacrificing daily comfort. Whether you're replacing worn components or building a sportier setup, understanding the available parts and their nuances helps you make the right choice. This guide covers everything from springs to sway bars, with practical buying advice.

What Is the A-Spec Suspension Package?

Introduced by Acura as a factory-backed performance option, the A-Spec package for the 2005 TL includes recalibrated springs, dampers, and sway bars. Unlike aftermarket coilovers, the A-Spec components maintain the original geometry while lowering ride height slightly and increasing spring rates. The result is reduced body roll and improved steering response without a harsh ride.

Key Components

The A-Spec suspension kit for the 2005 TL consists of:

• Front and rear springs: Approximately 10% stiffer than stock, lowering the car about 0.6 inches.
• Dampers (shocks and struts): Revalved to provide firmer compression and rebound damping.
• Front sway bar: 28mm diameter (stock is 26mm), with revised end links.
• Rear sway bar: 19mm diameter (stock is 17mm), with reinforced bushings.

These parts are designed to work together. Replacing just one component may not deliver the full benefit and could cause imbalance.

Genuine vs. Aftermarket A-Spec-Style Parts

When shopping for A-Spec parts, you have two main paths: OEM Acura components or aftermarket parts that mimic the A-Spec specifications.

OEM Acura Parts

Genuine A-Spec parts are still available through Acura dealerships and some online OEM suppliers. They carry a higher price but guarantee fitment and durability. Part numbers typically end with "-A01" or similar. For example, the front damper part number is 51605-SEP-A01. These parts are direct bolt-on and compatible with the 2004-2008 TL.

Aftermarket Equivalents

Several suspension manufacturers offer springs and shocks with A-Spec-like rates. For instance, Eibach Pro-Kit springs lower the TL about 1.0 inch and are slightly stiffer than A-Spec. Koni Yellow dampers are adjustable and often paired with A-Spec-style springs. While these combinations can outperform the OEM package, they require more careful tuning and may not be as refined.

Compatibility with 2004-2008 Acura TL

The A-Spec suspension fits all 2004-2008 Acura TL models, including base and Type-S. However, Type-S models come with a slightly stiffer stock suspension (different spring rates and damper calibrations). Installing A-Spec springs on a Type-S will lower it more than on a base model because the Type-S has shorter stock springs. For best results, use the complete A-Spec kit or pair A-Spec springs with Type-S dampers.

Important Notes

• 2004 vs. 2005: The A-Spec parts are identical for both years, but check that your car has the proper strut mounts and bump stops. Some 2004 models had revised upper mounts.
• Coupe vs. Sedan: The A-Spec package was only available for the sedan. Coupe owners can use these parts, but the rear sway bar attaches differently—the sedan uses drop links, while the coupe uses direct link mounts. Coupe owners need sedan-style end links or a different bar.
• Ride Height: After installation, expect approximately a 0.5–0.7 inch drop. If you want more drop, A-Spec springs are not the best choice; consider aftermarket coilovers.

Performance Gains and Trade-offs

Pros

• Reduced body roll: The larger sway bars and stiffer springs keep the car flatter through corners.
• Improved steering feel: Firmer dampers reduce dive under braking and squat during acceleration.
• OEM quality and longevity: Genuine parts typically last 60,000–80,000 miles before needing replacement.
• No suspension warning lights: Since the A-Spec package is OEM, it does not trigger any dash errors.

Cons

• Limited adjustability: Unlike coilovers, you cannot change ride height or damping.
• Firmer ride: The A-Spec suspension is about 20–30% stiffer than stock. It is still comfortable for daily driving but noticeably stiffer on rough roads.
• Cost: A complete OEM kit can cost over $1,200 for all four corners plus sway bars. Aftermarket alternatives are often cheaper.

Replacement vs. Upgrade: Deciding Which Parts to Buy

If your current suspension is worn (over 80,000 miles) and you want to refresh it, consider installing the A-Spec kit as a replacement. It provides better performance than new stock parts for a similar price. Alternatively, if you already have a firm suspension but want more roll control, adding just the A-Spec sway bars is a cost-effective upgrade.

Recommended Combinations

1. Full A-Spec kit: Best for those who want a proven, balanced setup. Buy all four dampers and springs, plus both sway bars.
2. A-Spec sway bars only: If you have aftermarket springs and dampers, the larger sway bars (28mm front, 19mm rear) reduce body roll significantly.
3. A-Spec springs with aftermarket dampers: Pair A-Spec lowering springs with Koni Yellow or Bilstein dampers for adjustable damping. This works well for canyon driving or autocross.

Installation Considerations

Installing A-Spec suspension requires standard mechanical skills. Expect about 4–6 hours on a lift. You will need spring compressors, torque wrenches, and alignment tools. After installation, get a professional alignment with the following specs: -0.5° to -1.0° front camber, 0.05° to 0.10° rear toe-in. The lowered ride height reduces negative camber, so stock alignment settings may cause uneven tire wear.

Tips for DIY

• Replace strut mounts, bump stops, and dust boots when installing new dampers—these parts wear out.
• Use anti-seize on bolts to prevent corrosion, especially in winter states.
• For the rear sway bar, consider polyurethane bushings for a tighter fit.

Parts You May Not Know You Need

When ordering A-Spec suspension parts, don't forget these often-overlooked items:

• Sway bar end links: The A-Spec bars use specific end links; stock ones may not fit. OEM end links are about $30 each.
• Strut top nuts: They are single-use and should be replaced.
• Lower control arm bolts: Can seize; have replacements ready.

Final Recommendation

For most 2005 Acura TL owners seeking improved handling without sacrificing daily usability, the genuine A-Spec suspension package is an excellent choice. It offers a noticeable performance upgrade with OEM reliability. If your budget is tight, start with the A-Spec sway bars—they make the biggest difference in cornering. For those wanting a more aggressive setup, combine A-Spec springs with quality aftermarket dampers. Regardless of your choice, ensure all components are compatible with your specific model year and body style. Proper installation and alignment will maximize the benefits and longevity of your suspension.