Stock-looking Subaru WRX STI runs the quarter mile in 10 seconds (video)

Mitchell Jones

What does it take to get a stock-looking WRX to bust the quarter mile in a Bugatti-buggering 10 seconds? Martin Donnon of SA’s Willall Racing has an idea, since that is a feat he and his team have pulled off.

The Subaru WRX STI ’25BB’ as it’s called – a throwback to the iconic 22B coupe – is based on a MY2015 STI shell but has a thoroughly rebuilt drivetrain, and a roll cage has been installed.

A gold-coloured billet block is rated for up to 800kW and can handle a staggering 50psi of turbo boost, or 3.5bar. The engine is bored out to 2.63 litres, and uses bespoke pistons, rods and crank. A unique and larger turbo assembly with special intercooler is added. This is fed through a PPG sequential gearbox and carbon fibre tailshaft.

The result? 0-100km/h in 2.7 seconds. 0-200km/h in 6.2 seconds. And a 10.1 second quarter mile at 233km/h, with more to come as this is the company’s development vehicle. For comparison sake, we managed VBox-verified 0-100km/h in 5.27 seconds in the stock 2016 STI and 6.6 seconds for the CVT-equipped regular WRX.

The 25BB is being built for overseas clients, with company boss Martin Donnon saying he would happily build one for a local client too. Check out the video below.

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