BMW Exhaust Center Sections

This factory midpipe from the N55 135i is a sound enhancement when used on the twin-turbo N54 models. This N55 midpipe does not have the secondary catalytic converters in place that the N54 cars had. Instead there are straight pipes leading to the resonator. Without the secondary catalytic converters in place the exhaust is louder and with more of a burble and rumble. It's a great first upgrade to make the N54 engine a bit louder and more aggressive! The problem with turbo engines is that the turbo itself will dampen the sound and make the engine harder to hear. And the N54 135i engine is further dampened by the secondary cats. This can be a problem on the track when you want other drivers to be able to hear you. This center section will restore some of that lost volume and open up the N54 engine. With less backpressure the turbos can spool up faster which will make a modest power improvement. There's an added bonus for the 1M coupe - drastically reduced droning at light throttle.

This is the factory BMW N55 midpipe. It's a direct fit to either the N54 or N55 engined cars with all of the correct bends and crimps to fit the E82 or E88 chassis. But it will only change the sound characteristics for cars with the N54 engine. The N54 and N55 use the same exhaust gaskets, rings, and hangers.

This product modifies (but does not remove or defeat) emissions equipment. For this reason this product may not be CARB compliant, and therefore not emissions legal in some states. Consult local laws and regulations in your area. For more information on this product, feel free to contact our sales department.

This item fits the following BMWs:
2008-2013 E82 BMW 135i 1M Coupe

Unlock the full potential of your G87 M2’s exhaust with the Eisenmann G87 M2 Center Pipe Set, designed to significantly enhance both sound and performance. While the S58 engine already offers a sound improvement over the S55, the stock center pipes remain a limiting factor. The OEM setup includes secondary catalytic converters and dual resonators, adding unnecessary weight and dampening the exhaust note. Eisenmann’s resonated center pipes, weighing 10 lbs less than the factory version, provide a noticeable upgrade in both weight reduction and exhaust tone.

These center pipes are engineered to integrate perfectly with the Eisenmann Performance Rear Exhaust but can also be installed with the factory rear section, offering flexibility in setup. Available in both resonated and non-resonated configurations, the system converts the European-style slip-on design to the fully bolt-on system preferred by U.S. enthusiasts, ensuring easy installation and a secure fit.

For those who want to keep the stock rear muffler, the non-resonated option features an integrated x-pipe, replacing the bulky resonators. This configuration optimizes exhaust flow, delivering a more aggressive sound while shedding weight. It’s a cost-effective upgrade that enhances performance without requiring a full exhaust system replacement.

Optional Black Series Finish: For added performance and protection, the Black Series Ceramic Coating offers a high-temperature ceramic coating, improving heat dissipation and providing superior corrosion resistance, ensuring long-lasting durability and style.