Jake Schnatter sent his BMW M4 to 4N Motorsport for their S55R26 package. The work starts with removing the factory twin-turbo 3.0 L S55 inline-six. 4N Motorsport builds a new 2.6 L “S55R26” inline-six capable of 9,000 rpm. The motor uses 4N Motorsport’s destroker kit featuring billet crankshaft with integrated crank hub, forged H-beam rods, and Mahle custom pistons. Boost is generated by a BorgWarner EFR8474 turbocharger bolted to a 4N Motorsport coated exhaust manifold. The combo produces 790 hp (581 kW) and 690 lb-ft (935 Nm) to the wheels. Watch the engine build and swap process in the video below.
Source: 4N Motorsport