The 2006 Subaru Impreza WRX STi remains a high-water mark for the brand’s performance heritage in North America. This particular Hawkeye model is finished in Obsidian Black Pearl and carries a reputation for raw, visceral speed. It features a built engine and a comprehensive list of suspension upgrades to handle increased power levels. Having spent its entire life in California, the car shows seventy thousand miles on its digital odometer. It represents a deeply personal build that balances street usability with a heavy focus on mechanical durability and high-boost potential.
Advanced Chassis and Suspension Tuning
Precision handling for this 2006 Subaru Impreza WRX STi comes from an extensive catalog of Whiteline and HKS hardware. The car sits on HKS Hipermax S coilovers, providing a lower center of gravity and much sharper turn-in response. Adjustable front and rear sway bars work with Hotchkis end links to keep the body flat during aggressive cornering. A roll-center adjuster kit and an anti-lift kit ensure the suspension geometry remains optimized for high-speed stability. These modifications transform the factory AWD platform into a much more communicative and capable track-day contender.
Refined Interior and Modern Technology
Inside the cabin, the 2006 Subaru Impreza WRX STi retains its signature black and blue Alcantara bolstered seating. The driver interacts with a leather-wrapped steering wheel while monitoring auxiliary gauges for vital oil and ethanol data. An Alpine CD stereo provides modern audio quality, though the turbocharged flat-four often provides the primary soundtrack. Automatic climate control and power windows ensure the interior remains a comfortable place for daily commuting between track sessions. Every control remains focused on the driver, reflecting the car’s original mission as a rally-bred performer.
Drive Line and Control Systems
Managing the massive torque of the 2006 Subaru Impreza WRX STi requires a robust and well-maintained drivetrain. Power travels through a six-speed manual transaxle and a driver-controlled center differential for maximum traction in all conditions. An ACT heavy-duty street clutch was installed to handle the increased load from the upgraded turbocharger system. Limited-slip front and rear differentials ensure that power reaches the asphalt with minimal waste. Recent maintenance included a transaxle fluid change and right front axle replacement to keep the system operating smoothly. This setup allows for total driver control over power distribution.
Built Performance and Engine Specs
The heart of this 2006 Subaru Impreza WRX STi is an IAG Stage 2 Tuff turbocharged 2.5-liter flat-four. Installed in 2021, the engine features JE Pro Seal gaskets, ARP head studs, and a COBB 20g turbocharger. A Process West intercooler and DeatschWerks 850cc injectors support a revised flex-fuel system for maximum output. The engine breathing is improved by a COBB air intake and a GESi catted downpipe for better flow. While the car cannot pass a California emissions test, it offers a level of raw performance that factory models cannot match. Every component was selected to provide a reliable and explosive driving experience.
Brembo Braking and BBS Styling
Stopping power for the 2006 Subaru Impreza WRX STi is handled by iconic gold-finished Brembo four-piston front calipers. These work with ventilated rotors and fresh brake fluid to provide consistent, fade-free performance under heavy use. Gold-finished 17-inch BBS alloy wheels provide the classic STi look and are mounted with high-performance Pirelli P Zero tires. Despite some minor scuffs on the wheels and faded paint on the scoop, the car’s visual presence remains undeniably aggressive. This combination of classic styling and modern braking hardware ensures the car remains safe and striking on the road.
Final Summary
The 2006 Subaru Impreza WRX STi is a specialized machine built for the enthusiast who values mechanical substance over show. Its built IAG engine and extensive suspension modifications make it a formidable performer in any environment. While it faces registration challenges in its home state, the quality of the components involved is unquestionable. This STi serves as a rolling tribute to the era of analog engagement and turbocharged all-wheel-drive dominance. It stands ready to deliver incredible thrills to its next dedicated owner outside of California. This Hawkeye remains a cornerstone of the Subaru tuning community.
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Source: bringatrailer.com
