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BMW M4 with 4N Motorsport’s Turbo S55R26

Published in engineswapdepot.com

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.

BMW M4 with destroked turbocharged S55R26 inline-six

turbocharged S55R26 inline-six in the engine bay of a BMW M4

turbocharged S55R26 inline-six in the engine bay of a BMW M4

S55R26 inline-six being installed into a BMW M4

destroked S55R26 inline-six being assembled

destroked S55R26 inline-six being assembled

Mahle pistons and 4N Motorspor H-beam rods prepped for a destroked S55 engine build

BMW M4 with destroked turbocharged S55R26 inline-six on the dyno

BMW M4 with custom exhaust

Source: 4N Motorsport

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