Subaru Impreza WRX STI S206 GRB
The Subaru Impreza WRX STI S206, produced in a strictly limited run of just 300 units in 2011, represented the pinnacle of the GRB-generation STI. Built by Subaru Tecnica International's (STI's) dedicated workshop rather than on the regular production line, the S206 was a hand-assembled masterpiece that showcased everything STI had learned from decades of motorsport and limited-edition specials.
The S206's engine was the star of the show. Each EJ207 flat-four was hand-assembled by STI's most experienced technicians, with individually balanced and blueprinted components. Pistons, connecting rods, and crankshafts were precisely matched, and each engine was individually tested before installation. Official output was listed at 320 horsepower (the standard Japanese-market STI figure), but the S206's hand-built engine was widely acknowledged to produce significantly more, with smoother power delivery and a willingness to rev that distinguished it from production engines.
The chassis received equally meticulous attention. Bilstein DampMatic monotube dampers with STI-specific valving provided exceptional body control while maintaining a degree of ride compliance. Flexible V-bars and draw stiffeners increased chassis rigidity without adding significant weight. The carbon fiber roof panel reduced both weight and center of gravity height, contributing to the S206's remarkably agile handling.
Braking was provided by massive Brembo monoblock calipers — 6-piston front and 4-piston rear — gripping large ventilated and cross-drilled rotors. This was the most powerful braking system ever fitted to a production STI and provided the kind of fade-free stopping power necessary for sustained circuit use.
The exterior was distinguished by a dry carbon rear wing, front lip spoiler, and STI-specific body elements including wider front fenders. The carbon roof was left exposed in a clear-coated weave pattern on some examples, creating a dramatic visual contrast with the painted body panels. Eighteen-inch BBS forged wheels were wrapped in 245/40R18 tires, providing a wider contact patch than the standard STI.
Inside, the S206 featured Recaro bucket seats trimmed in Alcantara with red stitching, an STI-branded Momo steering wheel, and an individually numbered plaque confirming its place in the 300-unit production run. The interior was otherwise similar to the standard STI, with the focus of STI's engineering effort clearly directed at the mechanical components.
The S206 was sold exclusively in Japan through a lottery system, as demand far exceeded the 300-unit supply. Prices on the secondary market began climbing immediately and have continued to appreciate as collectors recognize the S206 as one of the finest limited-edition STIs ever produced.
With only 300 built, finding an S206 is extremely difficult. Verify the numbered build plaque and confirm the car matches STI's production records. The hand-built engine should show smoother operation than a standard STI — if it doesn't, it may have been rebuilt with standard components. Check the carbon fiber roof and rear wing for damage, delamination, or repair evidence. The Bilstein DampMatic dampers are expensive to rebuild but essential to the car's character. Brembo monoblock calipers should be inspected for piston seal condition and pad wear. BBS wheels should be checked for cracks (common if the car has been tracked on poor surfaces). Any modification from stock significantly reduces value — originality is paramount on a limited-production STI. Full documentation, including the original lottery confirmation and build certificate, adds substantial value.
Built by hand at Subaru Tecnica International's facility in Gunma Prefecture. Limited to exactly 300 units, all sold in Japan through a lottery system. Each engine was individually balanced and blueprinted by STI's master technicians. A further variant, the S206 NBR Challenge Package (inspired by STI's Nurburgring 24 Hour race entry), was produced in even smaller numbers with additional dry carbon components and a roof-mounted vortex generator.