The BMW M4 is no slouch when it comes to performance, but many car guys and gals are always out for more performance. Dinan Engineering is a name that has been associated with hopped up BMWs for decades and its latest foray into modern BMWs is the S1 BMW M4.
Thai car is a bit milder than other Dinan BMWs in that it doesn’t get an entirely new engine. This car has relatively modest upgrades. Relatively modest because upgrading any BMW is an expensive proposition. Dinan spends only $7247 upgrading the engine here. Not cheap, but certainly better than some previous models where engine mods alone were over $30,000.
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https://www.slashgear.com/dinan-engineering-s1-bmw-m4-adds-power-loses-performance-27416152/
