Best Aftermarket Suspension Parts for 2008 Subaru Impreza

The 2008 Subaru Impreza, whether a WRX or naturally aspirated model, is a fun and capable car right off the lot. But after a decade or more, the stock suspension can feel tired—soft springs, worn struts, and excessive body roll. Upgrading to quality aftermarket suspension parts transforms the Impreza's handling, responsiveness, and ride quality. This guide covers the best aftermarket suspension components for the 2008 Impreza, helping you choose the right parts for your driving style and budget.

Understanding Your 2008 Subaru Impreza Suspension Needs

Before buying parts, define your goals. Are you daily driving, hitting autocross, tackling track days, or building a weekend canyon carver? The 2008 Impreza benefits from upgrades that reduce body roll, improve turn-in, and provide better damping. WRX models have different suspension geometry and higher power output, so components often differ slightly from the base Impreza. Common issues include worn shock absorbers, sagging springs, and rubber bushings that deflect under load. Identify your priorities—comfort, performance, or a blend of both—to guide your part selection.

Key Aftermarket Suspension Components

Coilovers

Coilovers replace the entire strut assembly with an adjustable shock and spring combination. They offer ride height adjustment, damping control, and often camber adjustment via camber plates. For the 2008 Impreza, coilovers are the most popular upgrade because they lower the center of gravity and allow fine-tuning for different driving conditions. Entry-level options (e.g., BC Racing BR series, Tein Street Basis) offer good performance for street use. Track-focused coilovers (e.g., KW Variant 3, Feal 441) provide external reservoirs and stiffer spring rates. Coilovers are ideal if you want maximum adjustability and are willing to sacrifice some ride comfort.

Strut and Spring Combos

If you want a simpler install and a more comfortable ride, a strut and spring combo is a great choice. This involves pairing aftermarket performance springs (like Eibach Pro-Kit or H&R Sport Springs) with high-quality struts (such as KYB Excel-G or Bilstein B6). Progressive springs offer a smooth ride during normal driving but stiffen under load, while linear springs provide consistent rates. This setup lowers the car about 1–1.5 inches, reduces body roll, and improves handling without the harshness of coilovers. It’s a cost-effective upgrade for daily drivers.

Sway Bars

Sway bars (anti-roll bars) are one of the most effective ways to reduce body roll and improve cornering stability. Upgrading to a thicker front and rear sway bar (e.g., Whiteline, Eibach, or Hotchkis) dramatically decreases lean without affecting ride quality over bumps. For the 2008 Impreza, a rear sway bar upgrade is often recommended first to reduce understeer. Consider adjustable end links (Whiteline or Moog) to eliminate slop and allow pre-load adjustment. Sway bars work well with any other suspension upgrade.

Strut Tower Braces

A strut tower brace connects the suspension towers, reducing chassis flex during cornering. This improves steering response and front-end stability. For the 2008 Impreza, a front strut brace (like Cusco or Carbing) is a simple bolt-on that makes a noticeable difference. A rear strut brace can also help in wagon models. While not as impactful as springs or dampers, it’s a worthwhile addition.

Bushings and End Links

Factory rubber bushings deflect under load, causing vague handling. Replacing them with polyurethane bushings (from Whiteline or Energy Suspension) reduces deflection and improves steering feel. Key areas include front control arm bushings, rear trailing arm bushings, and subframe bushings. This is more involved but dramatically tightens up the suspension. Upgraded end links (with spherical bearings or polyurethane) also reduce play.

Coilovers: The All-in-One Upgrade

Coilovers offer the most comprehensive improvement for the 2008 Impreza. They combine height adjustability, damping control, and often camber plates. For street-driven cars, choose a dual-rate spring setup with a comfortable spring rate (around 7k front / 5k rear for WRX). Brands like BC Racing, Tein, and KW are proven choices. Entry-level coilovers typically cost $800–$1,200 and provide a firm but tolerable ride. Mid-range options ($1,500–$2,500) add features like independent compression and rebound adjustment. Track-oriented coilovers have stiffer springs and external reservoirs for consistent damping. Remember that lowering the car too much can negatively impact roll center and bump steer, so aim for a moderate drop (1–1.5 inches).

Strut and Spring Combos

For those who prioritize daily comfort, a matched strut and spring kit is a smart choice. Check out KYB Excel-G struts with Eibach Pro-Kit springs—this combination lowers the car modestly while improving handling and ride quality. Alternatively, Bilstein B6 struts paired with H&R Sport Springs offer a sportier feel. These setups retain the factory top mounts and can often reuse existing bump stops. Installation is straightforward and can be done at home with basic tools. This path saves money compared to coilovers and still delivers noticeable performance gains.

Sway Bars and Chassis Bracing

Increasing sway bar stiffness is one of the most cost-effective handling upgrades. For the 2008 Impreza, a 22mm rear adjustable bar (like Whiteline) can reduce understeer and improve rotation. Pair it with a matching front bar (24mm) for balanced handling. Always upgrade end links when upgrading sway bars; polyurethane bushings also reduce noise. Chassis braces like a front strut bar, rear strut bar, and lower tie bar further stiffen the platform. These braces are especially effective on the 2008 Impreza because the chassis is less rigid than newer models.

Bushings: The Overlooked Upgrade

Aftermarket bushings are a game-changer for steering feel. The 2008 Impreza benefits from front control arm bushing inserts (Whiteline W53327) to locate the front wheels precisely under braking and cornering. Rear subframe bushings (Whiteline W71502) reduce wheel hop on WRX models. Polyurethane bushings for the rear trailing and lateral links also sharpen response. Install these when replacing other suspension parts to save labor. The improvement in feedback is well worth the slight increase in NVH.

Putting It All Together: Building a Suspension Setup

• Budget Street Build: Replace worn struts with KYB Excel-G and add Eibach Pro-Kit springs. Install a rear sway bar (22mm adjustable) with polyurethane end links. Cost: ~$600–$800. Great for daily driving with occasional spirited corners.
• Performance Street Build: BC Racing BR coilovers (or Tein Flex Z) with 7k/5k springs. Add a front strut brace and rear sway bar (24mm). Upgrade your front control arm bushings. Cost: ~$1,500–$2,000. Balanced for aggressive street driving and autocross.
• Track/AutoX Build: KW Variant 3 coilovers or Feal 441 with race springs. Adjustable sway bars front and rear (Whiteline or Hotchkis). Full polyurethane bushing set (Energy Suspension). Replace end links with spherical units. Cost: ~$3,500+. Maximizes grip and adjustability for competitive use.

Final Recommendation

For most 2008 Subaru Impreza owners, a set of adjustable coilovers like BC Racing BR series or Tein Flex Z offers the best balance of performance, adjustability, and value. Combined with a rear sway bar upgrade and new strut mounts, this transforms the Impreza’s handling. If you prioritize comfort or have a tight budget, a KYB/Eibach strut/spring combo plus a rear sway bar is an excellent choice. Always get a professional alignment after installing suspension parts to maximize tire wear and handling. Upgrade in stages—start with the component that addresses your biggest complaint. With the right parts, your 2008 Impreza will handle like a new car.