The best mods for a 2006-2007 Subaru WRX play to the "hawkeye" generation's strengths: its larger-displacement turbocharged engine delivers stronger low-end torque than the earlier 2.0-liter cars, so a cat-back exhaust, a quality intercooler upgrade, and engine management unlock meaningful power. Pair power mods with suspension and brake upgrades, because the GD chassis responds dramatically to good coilovers, sway bars, and stickier tires.

The 2006-2007 WRX sits in a sweet spot: it keeps the beloved GD-chassis driving feel and massive parts interchange with 2002-2005 models, but adds the 2.5-liter turbo engine, revised gearing, and sharper hawkeye styling. Because the platform is shared, you benefit from two decades of aftermarket development — from daily-driver-friendly bolt-ons to full track builds — at prices far below what newer platforms command.

Popular brands here include Cobb for tuning and engine management, Invidia for exhaust systems, and Seibon for carbon fiber body panels that cut weight and add aggressive styling. Drivetrain feel gets a big lift from the Perrin pitch stop mount, while details like the GrimmSpeed Hella horn kit add rally-bred character. Compare with the earlier 2002-2005 WRX collection or jump to the newer 08-14 WRX/STI generation, and read our BC Racing coilover guide before choosing suspension.

Do 2002-2005 WRX parts fit the 2006-2007 WRX?

Most chassis, suspension, and drivetrain parts do, since both use the GD platform — but engine and some drivetrain parts differ with the 2.5-liter engine. Always verify fitment notes against your exact year and model.

Does a 2006-2007 WRX need a tune with basic bolt-ons?

A cat-back alone is generally fine without one, but intakes, downpipes, and intercooler changes alter airflow enough that a tune is strongly recommended to protect the engine and realize the gains.

Are coilovers worth it on a daily-driven hawkeye?

Yes, if you choose a street-oriented setup. Quality coilovers with adjustable damping improve both handling and ride composure over worn factory struts — just get an alignment immediately after installation.

What maintenance should I handle before adding power?

At this age, verify timing belt service, check for head gasket and turbo oil-feed issues common to higher-mileage EJ engines, and inspect for rust. A healthy stock car responds far better to modifications.