BMW’s M division is renowned for delivering the utmost pinnacle of automotive performance. That’s no secret. For decades, the letter M has become synonymous with the perfect distribution of performance and luxury, with the M3 topping the charts in the compact class. It’s the benchmark in terms of enthusiast vehicles. Being a driver’s car means, though, means that we enthusiasts can’t keep our hands out of the engine bay. We need to fiddle and tweak even the likes of the G8X M3/M4 until it perfectly matches our tastes. That tinkering typically starts with the intake system.