Back when BMW was still offering naturally aspirated mills, getting that winning edge over your rival through tuning wasn’t all that easy. Atmospheric engines are a lot harder to enhance compared to their turbocharged brothers and that’s a fact. Usually, getting more horsepower meant you had to add things like a cold air intake, a new exhaust, and maybe a new ECU map that would make the engine run on different parameters. However, increases in output were mild at most.
Without forced induction there really was little you could do. On average, installing a new intake and a new exhaust could add somewhere between 5 and 10 percent in horsepower, a lot less than what we’re used to today. Even so, a lot of people preferred that kind of tuning because along with it came a new experience. We’re talking about a change in the car’s character coming in the shape of new sounds.
If you want to, you can also do that with the turbocharged models of today and the car we’re showing you here did just that. The owner of this Alpine White BMW M4 Convertible wanted to add a Dinan carbon fiber cold air intake to his car mostly for the changed intake sound than for the power gains. Don’t get me wrong there is some power added to the mix as well, about 14 HP and 21 lb-ft (28 Nm) of torque to be more precise, but I’m guessing that’s not why the new intake was installed.
Apart from the new carbon fiber bits under the hood that you can’t really notice from afar, the M4 also has a Dinan exhaust system, RKP carbon fiber trunk spoiler and a lot of M Performance goodies, from the front splitter to the rear diffuser, side skirts and even mirror covers. As a complete package, this BMW is quite the looker.