The final second-generation WRX STI saw the debut of Subaru's now familiar corporate face. Dubbed the Hawk Eye key changes included a longer wheelbase, sharper steering, a larger-capacity 2.5-litre boxer engine for UK models, revised suspension and DCCD for all markets. As with previous models Prodrive produced a Performance Pack (PPP), which took a standard STI from 281hp to 320hp and, for those who wanted a lower profile, Subaru also launched a limited-edition Spec D model for the UK - with Crystal Grey metallic paint and leather upholstery. More extrovert STI buyers however choose the Black RB320 limited edition - with the PPP, a bespoke chassis (boasting Bilstein dampers, Eibach springs and a lower ride height) a mesh grille and a new front lip spoiler. Meanwhile the WRX edged closer to the STI with the release of a 270hp WRX GB270 limited-edition model in September 2007. Japan also received a Spec C and Spec C Type-RA models.
Any Hawk Eye STI is a good starting point for modifications. According to Paul at Zen Performance, "The six-speed gearbox has the perfect set of ratios to go with a 2.5 motor and the turbo and injector setup is good for around 360hp with supporting mods. And the drive-by-wire system allows for some nice features via Ecutek tuning on road cars."
Buy if: You're looking for a decent investment, but it must be a low-mileage GB270 or an RB320
Don't buy if: The car is a seriously modified import or you're remotely bothered about fuel economy
We found:2005 WRX estate with Prodrive Performance Pack, 63,000, £6,995
Price Guide
Poor: Under £3,500
Good: £4,000 to £8,000
A1: £9,000+
Special Editions: RB320 £10,000 to £15,000, Spec D £6,000 to £10,500, GB270 £7,000 to £13,000