Watch: The Guntherwerks 400R Review

What do you call a Guntherwerks 400R? Hot rodded? Mod rodded? I’m not sure, but it’s loud, quick, nimble, and unlike any Porsche 911 on the road.

We teamed up with Brian Makse – a championship-winning racing driver, writer, and presenter – to film the hottest new cars and put them to the test. Brian’s reviews are filtered through the lens of an experienced driver and each vehicle is measured by a driver-first benchmark.