[Video] BMW M4 CSL Sounds Angrier with its Custom Exhaust

One of the early adopters has already customized the hard-core coupe since BMW began producing the M4 CSL in July. One of these is the owner of this Alpine White model. He contacts Valvetronic Designs to request a more powerful soundtrack for the vehicle. Since this car is for the American market, eliminating the gasoline particle filter (OPF) gave it an advantage over its European counterpart.

The CSL features a titanium rear silencer to save four kilos over the exhaust system installed on the standard M4 (nearly nine pounds). The aftermarket expert affirms that the remaining pipe is taken from the regular model. Although the inline-six engine’s sound is a little more thrilling now, the owner preferred a more aggressive sound.

To give the M4 CSL a more aggressive sound, a single mid pipe was made to order. We’d honestly like to eliminate the excessive pops and crackles, but everyone has their own preferences. A louder exhaust seems appropriate because the Competition Sport Lightweight is undeniably more shouty than the less powerful M4s. Given that BMW only produces 1,000 units for the entire world, with 200 to 250 vehicles destined for North America, Valvetronic only speaks to a small audience.

The new 3.0 CSL, whose S58 engine is even more potent, also gets the lightweight titanium rear silencer. This model produces an additional 10 horsepower over the M4 CSL or a healthy 560 hp (412 kW). However, due to the switch from an automatic to a manual transmission, torque is down by 100 Nm (74 lb-ft) to 550 Nm (404 lb-ft).

Those 50 3.0 CSL owners are unlikely to modify their vehicles. In retrospect, we are a little shocked by the number of M4 CSL owners already open to their M4 customization.