Source-Pistonheads Subaru has announced a new special edition Impreza WRX STI in memory of rally hero Richard Burns who died in November last year of cancer. Called the RB320, the new car features around £6,000 worth of extra equipment including the 316bhp Prodrive Performance Pack, yet costs £29,995 on-the-road â?? an increase of only £3,500. Available only in Obsidian Black, the RB320 features bespoke 18-inch alloy wheels and specially developed Prodrive suspension comprising Bilstein dampers, a sports spring kit with revised rear anti-roll bar and a ride heigh