As we all know, modern-day exhaust systems are heavily regulated to control sound and emissions levels, so it’s rare to see an automaker offer a factory-supported exhaust option. Most critically, the catalytic converters can’t be modified or removed according to most state laws, so there’s still some leeway.
The M3’s normally aspirated 4.0-liter V-8 already sounds good, but the addition of the new M Performance Exhaust is designed to accentuate the eight-cylinder note and rumble even more. BMW chose a heat-resistant and thin chrome-nickel alloy called Inconel while drafting the exhaust. By going from 1.5-millimeter-thick to 0.8-millimeter-thick tubing, the German automaker was able to save 20 pounds off the stock unit, a 40-percent weight reduction. Like any good exhaust, the fresh piece reduces backpressure.
In addition to Inconel, the exhaust tips were molded from titanium, then laser-engraved with the famous M logo. BMW has stayed mum on any power boost, but the linked YouTube video below reveals a notable change to its exhaust tone, and we like what our ears are picking up. The best shots of the video’s M3 Coupe tester are found at the track, where the V-8 is able to unwind and let loose its 414 horsepower. The course appears to be Lime Rock Park in Connecticut.
And the cost? The system is fully factory approved and carries a price tag of $4374, not including installation. The M Performance Exhaust fits the convertible, coupe, and sedan, and comes with a factory warranty.