Gutted BMW M4 Competition good for over 800 horsepower | #FastFriday

Colin
By Colin Wood
Jan 16, 2026 | BMW, Ultimate Track Car Challenge, Grassroots Motorsports, Tire Rack, BMW M4

Photograph courtesy Adam Slowinski

I believe I have one of the fastest G82 M4’s in the United States,” driver Adam Slowinski says of his 2024 BMW M4 Competition xDrive, and he even brought some receipts to back up that claim:

  • 1:46:465 fastest lap at SCCA Time Trials Nationals at Pitt Race
    • Placed first in class–with a margin of over four seconds–and second overall
    • Reset the Unlimited 1 class record by 2 seconds.
  • 1:21:82 fastest lap at New Jersey Motorsport Park’s Thunderbolt circuit–in the rain

Currently capable of over 800 horsepower at wheels–with stock turbos, Slowinski points out–the M4 has also been fully gutted and features a G82 GT4-style aero package. Our favorite mod listed, however, is a tie between “carbon carbon carbon” and “more carbon.”

What’s next for Slowinski and the M4? “I hope to keep pushing this car and innovating creative ways to extract both more speed from the car and from myself,” he says.

Fitting, then, that he’s entered the BMW to compete in the Tire Rack Ultimate Track Car Challenge Presented by Grassroots Motorsports, as he'll have to push both himself and the M4 in the battle for the title of Ultimate Track Car.

Just about anything is eligible to compete so long as both car and driver pass a safety inspection. If that applies to you, enter your car todayWe also have several prizes and awards to give out, and entrants get coverage in a future issue of Grassroots Motorsports.

Our annual search for the fasted track machine on four wheels takes place at Eagles Canyon Raceway on October 22 and will once again join the Tire Rack SCCA Time Trials Nationals Powered by Hagerty.

The Tire Rack Ultimate Track Car Challenge is presented by Grassroots Motorsports in association with WilwoodVitour TireCRC IndustriesVbox Motorsport and Red Line Oil, with trophies from BimmerWorldNine Lives Racing and Falken Tire.

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Comments
nickydh
nickydh GRM+ Memberand New Reader
1/16/26 12:26 p.m.

That thing is just spitting at me like an angry green monster…surprise

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