A twin turbo, 4.4 liter, 555 horsepower SUV? Only from the M division of BMW could a beast such as this be set loose on the world. Akrapovič is proud to have designed an exhaust system that unleashes the typical V8 roar from the engine.
This “cat back” exhaust system is manufactured entirely from titanium. One of the most important changes is the incorporation of an X-pipe in the system. The inclusion of an X-pipe increases low to mid-range power while at the same time producing a deeper exhaust note that the original system lacks. Additionally, a pair of resonators are added to eliminate any chance of in-cabin droning. The mounting flanges are made of cast titanium from our in-house foundry and ensure a perfect, leak-free fit.
Moving to the muffler section of our system, we have retained the “dualmode” exhaust flap control from the original system. This allows the vehicle to have a more civilized, but deeper than stock sound at low speed. However, at higher RPM (or when selecting the “S” mode on the gearshift) the muffler is bypassed, creating a deep and sporty sound much more in keeping with the personality of the car.
Two exhaust tail pipe options are available; both are 100 mm in diameter. The first is made completely from titanium while the other is crafted from a carbon fiber/titanium composite. The carbon fiber version was developed on the MotoGP Safety Car, which is driven at sustained high speed, to guarantee uncompromised durability.
Performance has not been left out of the design. The system dramatically reduces backpressure and is an excellent starting point for further engine tuning or turbo modifications. Even when installed on an otherwise stock vehicle a gain of 11 horsepower and 15 Nm/11 lbs-ft of torque are achieved. Furthermore, a weight reduction of 23 kg/51 lbs. is realized. The OEM catalysts are retained, so no reflashing of the ECU is required and the check engine light will not be triggered.
For ultimate tuning potential, additional weight reduction, and a great racing sound, we offer stainless steel downpipes without cats. These high-flow downpipes require ECU reprogramming and are a perfect fit with the Evolution exhaust system.
These catless downpipes alter or delete the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.
video: BMW X5M, X6M Akrapovic Evolution Titanium Exhaust System
Evolution system, homologated:
Titanium link pipe set with resonators
Titanium X-pipe
Titanium muffler with integrated exhaust valves
Statistics:
+11 HP (at 6,200 rpm)
+15 Nm/11 lbs-ft of torque (at 2,270 rpm)
23 kg/51 lbs. lighter than stock
FREE UPS GROUND SHIPPING! FREE UPS Ground shipping within the 48 contiguous states.
This item fits the following BMWs:
2009+ E70 BMW X5M
2009+ E71 BMW X6M
O2 Sensor Bung and plug. This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing. A threaded plug is included to cap off when not in use. Bung and cap/plug are both 100% stainless steel. The bung and plug are also available separately (in case you don't need both). Simply choose your option below.
TMS Oxygen Sensor Bung Specs:
Material 304 stainless steel
1.00" / 25.4mm OD
0.50" / 12.7mm Tall
Thread size and pitch M18x1.5
TMS O2 Sensor Plug & Crush Ring Specs
Material 304 stainless steel
10mm female hex for install and removal
Thread size and pitch M18x1.5
Copper Crush Ring for leak free installation
Install Tips
Locate bung as close to engine a possible, without exceeding the maximum operating temperature for the O2 sensor. The suggested location is just down-stream of the merge-collector on each bank of cylinders.
Sensors located after upstream exhaust system leaks or too close to exhaust outlets are susceptible to poor readings or influence of ambient air
O2 Sensors exposed to exhaust gasses with too high amount of un-burnt fuel can lead to misleading readings. A possible lean reading.
Locate sensor/bung 90° to exhaust gas stream.
Locate sensor/bung in tube with a minimum of 10° up angel to prevent liquid build up in sensor element.
Use stainless steel welding wire or rod when installing bung.
Do not have bung plug or a oxygen sensor installed when welding bung in place.
Welding can distort the bung so it is recommended you chase/tap the threads of the bung after welding.
When installing O2 sensor or plug, use an O2 sensor compatible high temperature resistant grease on the threads.
Use tightening torque suggested by O2 senor manufacturer.
With years of experience with dealing with exhaust systems of all kinds, we've found this product to be the BEST at fixing or preventing exhaust leaks. Just apply a light coating of Acousti/seal to pipes, flanges or slip-fit clamps before assembly for a leak free installation. 5 ounce tube (142 grams).
(E70) X5 2007+
Akrapovic Exhaust
O2 Sensor Bung and plug. This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing. A threaded plug is included to cap off when not in use. Bung and cap/plug are both 100% stainless steel. The bung and plug are also available separately (in case you don't need both). Simply choose your option below.
