BMW Exhaust Center Sections

Unlock the true potential of your B58 while retaining the functionality of the factory valved rear muffler. The ECS Tuning Center Muffler Delete replaces the restrictive OEM midsection with high-flow, TIG-welded 304 stainless steel tubing, improving both exhaust flow and acoustic character.

This direct-fit upgrade removes the factory resonator and center muffler, reducing system weight by approximately 8 lbs and eliminating built-in restrictions that limit performance. The result is a deeper, more aggressive exhaust tone with enhanced burbles, delivered without unwanted drone.

Design:

1.25mm wall brushed 304 stainless steel tubing, TIG-welded for durability
Single 80mm pipe with factory style mounting bracket and downpipe flange
~8 lbs lighter than stock by eliminating the bulky resonator and muffler
Bolts to the factory downpipe and valved muffler using OEM-style clamps
Slip joints and 304 stainless Accuseal clamps allow fine alignment
Uses OEM hanger locations and attaches at designated cut points for ease of install and potential reversibility
Routes around OEM chassis braces with proper spacing
Kit Contents:

Front exhaust section
Mid-pipe exhaust section
OEM-style downpipe clamp
Rear sleeve clamp
Engineered for enthusiasts who want more sound, less restriction, and uncompromising fitment, this resonator delete delivers a refined yet aggressive exhaust character while allowing your B58 to breathe more freely.

Installation and Support:

Installation is as easy as cutting, placing into position, and clamping! - Click HERE for Installation Instructions -
Tools you might want for the job:
Exhaust pipe cutter - T38545
Product Development:

The ECS 40 Resonator delete was designed, engineered, tested, and quality inspected by ECS Tuning's Research and Development team. Their process incorporates industry-leading tools and methods, including FARO laser scanning for reverse engineering and quality assurance, SolidWorks 3D CAD modeling, in-house 3D printing for rapid prototyping, and rigorous long-term product testing. Performance data is validated using both a Mustang AWD 500 SE in-ground dyno and a Superflow SF-750 Flowbench to ensure precision and reliability.

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