We reported about Cosworth working on a special edition of the Subaru Impreza WRX STI some time ago, and now its officially here. Here are the first official photos of the highly anticipated Impreza WRX STI Cosworth edition. Set to go on sale this June in the UK only and in a limited-run of just 75 units, the Cosworth Impreza STI CS400 promises supercar-like performance figures in a hot hatch.
Cosworth's engineers started work on the STI's 2.5-liter boxer unit, installing new high-performance pistons, connecting rods, head gaskets and bearings. The mod works also includes a remapped ECU, a modified turbocharger and wastegate as well as a new custom exhaust system.
The result of all that work is an impressive 395hp at 5,750rpm, enough to propel the Cosworth Impreza STI CS400 too 100km/h in a mere 3.7-seconds. Just for comparison sake, the standard 296hp Impreza WRX STI completes the 100km/h sprint in 5.2-seconds.
According to reports from Subaru, the CS400 also gets revamped suspension with new coil springs and a 10mm lower ride-height as well as a bespoke brake package with six-pot callipers and 355mm discs at the front that were co-developed with AP Racing.
In the styling department, the changes are extremely subtle consisting of a redesigned front bumper with an integrated lower spoiler and a mesh grille, Cosworth logos, a different rear spoiler and specific 18-inch alloy wheels.
Finally, the limited edition Impreza STI CS400 gets a pair of Recaro bucket seats, glossy black dashboard trim and of course, Cosworth badges.
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