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The McLaren 720S is one of the most devastatingly fast supercars ever built — and its M840T 4.0-liter twin-turbo V8 is the reason. Producing 710 HP from the factory, the 720S already embarrasses cars costing three times as much. But the factory catalytic converters sitting directly downstream of each turbocharger create a massive restriction where exhaust gas velocity is highest. Replacing them with aftermarket downpipes is the single most effective bolt-on modification you can make to unlock the M840T's full potential.This guide covers everything you need to know about upgrading the downpipes on your McLaren 720S: catless race downpipes versus...

The McLaren M838T 3.8-liter twin-turbo V8 is the engine that defined the modern McLaren era — powering the 570S, 570GT, 540C, 650S, and MP4-12C. These mid-engined supercars produce extraordinary power from the factory, but the restrictive catalytic converters downstream of each turbocharger leave significant performance on the table. Replacing the factory downpipes is the single most effective bolt-on modification you can make to the M838T platform.This guide covers everything you need to know about upgrading the downpipes on your McLaren: catless race downpipes versus high-flow catted options, real-world power gains, exhaust sound transformation, fitment across the entire M838T lineup, installation...