Manufacturing was outsourced to Hi-Tech Automotive,[1][2] based in Port Elizabeth, South Africa.

With this engine as a base, Noble fits high-lift camshafts, revised fuel injection, and Garrett AiResearch T28 twin-turbochargers.

The most notable differences from the M12 (a car which the M400 is largely based on) are the use of forged pistons, T28 turbos, a front anti-roll bar, stiffer springs, different shocks, Pirelli P Zero tyres, a smoother gear shifter, and a slightly narrower central tunnel as the driver now sits a bit more central than previous models.

The main change is the addition of side pods to channel air into the engine and to create a visual impact.

Although, the M400 is no longer in production, the exclusive dealer for Noble in the US, 1G Racing in Ohio, USA (also known as Rossion), had obtained the production rights to the M400 from Noble Automotive, and has released an updated version named Rossion Q1.