The hot-V layout is a turbocharging setup that allows short and direct exhaust plumbing out of an engine’s center valley to improve turbo efficiency and response. Applying that approach to your standard 60-degree V-6 leads to fitment problems, because there’s not enough room in the valley of the V to efficiently mount turbochargers. It also won’t work with a 180-degree (flat) six, as in a Porsche 911, because packaging a turbo close to the engine and exhaust manifolds would mean mounting the engine higher, negatively affecting the car’s center of gravity.
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