The guys from Dinan need no introduction. They are basically the AC Schnitzer of the US, offering incredibly well-designed products for BMW cars, without voiding your warranty. The team has recently brought out a new exhaust system for the BMW X3 M and X4 M models, compatible with Competition versions as well. The new axle-back system doesn’t just change the note of the exhaust but has other benefits as well.

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According to Dinan, their measurements on the dyno showed that, when fitted with their exhaust, BMW X3 M models gained up to 8 horsepower and 6 lb-ft of torque. That’s not a lot, but considering it comes with a better sound as well and a lighter construction (saving up 5 lbs compared to the stock version) it makes a compelling case for it. The design isn’t too shabby either, although you’re only going to see the four 114 mm tailpipes at the back available in either ceramic black or a polished finish.

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The exhaust is made of 100% 304 brushed stainless steel and has TIG welding that looks very nicely done. It is also a bit wider than the stock configuration. Whereas the cars come with 70 mm pipes for the exhaust from the assembly line, the Dinan version has a diameter of 76 mm. As usual, the exhaust works with the car’s computer, allowing you to control the valves in the final silencers just like you would on a stock model.

All things considered, many people will only change their exhausts based on the sound and, as you can hear from the soundbites below, the Dinan exhaust has a very nice sound to it. It’s not too loud, not too raspy, just right. It’s also not expensive, considering it’s coming from a well-known tuner like Dinan. At $2,300 it’s actually a good deal. Check it out in the photos and video below.