GB4

What it is

GB4 is a British entry-level single-seater championship, designed as a first step into car racing. Like F4, it sits at the first rung of the single-seater ladder in the UK, before GB3.

Who it suits

Karting graduates and first-year car drivers who want to learn single-seaters in the UK, with a clear next step into GB3.

Testing with Karat

Karat's GB4 test days include the car, tyres, an engineer and a mechanic, and your data and video afterwards, so you can build experience before and during a season. Comparing first cars? Read choosing your first single-seater.