Well, that certainly didn't take very long. Though deliveries of the outrageous, hugely entertaining, andhyperactive Toyota GR Yarisare just getting underway overseas, the aftermarket is lining up to tweak just about every facet of the tiny turbo terror. The latest pusher for the power-mad appears to be DTE Systems, which now has a tuning package for the GR Yaris that pushes output to more than 300 horses.

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This hell-hot Yaris's new turbocharged 1.6-liter three-cylinder already blew our mental socks clean off with 257 hp and 265 lb-ft of torque when we drove it earlier last month, so DTE's claim of 310 horses and 298 lb-ft of torque should hit like a cattle-prod to the spinal cord. DTE unlocks this extra oomph by tuning the Yaris's ECU, modifying unspecified parameters for extra go. If we had to guess, this likely includes running richer (or leaner when required), a smidge more boost, and revised injection mapping.

If you're not keen on wrangling this extra power every time you pop down to the shops or pick up grandpa for a weekend outing, customers utilize DTE's PowerControl X mobile app to step the tune between three different drive modes—Sport, Dynamic, and Efficiency. Not enough? DTE also offers its PedalBox kit that allows drivers to mess with throttle mapping on the go—if you're into that kind of thing.

Alternatively, U.K.-based tuning house Litchfield is also hard at work on a suite of upgrades for Toyota's mighty mite. Preliminary data suggest a nice, round 300 horsepower, but Litchfield is still developing the kit. Also in the works from Litchfield is a comprehensive suspension package that drops the GR's relatively tall WRC-spec ride-height, so stay tuned for that. Well, that is if you live in a market where the GR Yaris is sold; us GR-less Yanks can only look on with unbridled jealousy.

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