Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all states except California. We also offer a version that is legal all 50 states including California.
This item fits the following BMWs:
1989-1991 E34 BMW 535i
1988-1992 E32 BMW 735i 735il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all 50 states including California.
This item fits the following BMWs:
1989-1991 E34 BMW 535i
1988-1992 E32 BMW 735i 735il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all 50 states including California.
Left Side
- Cylinders 5-8, Bank 2
This item fits the following BMWs:
1993-3/1994 E34 BMW 540i
1992-1994 E32 BMW 740i - not for 740il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all 50 states including California.
Right Side
- Cylinders 1-4, Bank 1
This item fits the following BMWs:
1993-3/1994 E34 BMW 540i
1992-1994 E32 BMW 740i - not for 740il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all states except California. We also offer a version that is legal all 50 states including California.
Left Side
- Cylinders 5-8, Bank 2
This item fits the following BMWs:
1993-3/1994 E34 BMW 540i
1992-1994 E32 BMW 740i - not for 740il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all states except California. We also offer a version that is legal all 50 states including California.
Right Side
- Cylinders 1-4, Bank 1
This item fits the following BMWs:
1993-3/1994 E34 BMW 540i
1992-1994 E32 BMW 740i - not for 740il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all states except California. We also offer a version that is legal all 50 states including California.
Left Side - Cylinders 7-12, Bank 2
This item fits the following BMWs:
1988-1994 E32 BMW 750il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all 50 states including California.
Left Side - Cylinders
7-12, Bank 2
This item fits the following BMWs:
1988-1994 E32 BMW 750il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all states except California. We also offer a version that is legal all 50 states including California.
Right Side - Cylinders 1-6, Bank 1
This item fits the following BMWs:
1988-1994 E32 BMW 750il
Direct fit and replacement to OEM but at a third of the cost. No welding required because these bolt on to your stock exhaust manifold and muffler. Backed by a manufacturers warranty - 2 years on the catalyst and 5 years on the external pipes. Legal in all 50 states including California.
Right Side - Cylinders
1-6, Bank 1
This item fits the following BMWs:
1988-1994 E32 BMW 750il
This direct fit Bosch oxygen sensor plugs directly into your factory connector. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. It fits BMW E24 E32 E34. Bosch # 13 052.
This item fits the following BMWs:
1988-1989 E24 BMW 635csi
1989-1993 E34 BMW 535i M5
1988-1992 E32 BMW 735i 735il
A new oxygen sensor can improve driveability and lengthen engine life. Ultimately, you achieve a smoother running engine that is more fuel efficient. Feedback from the oxygen sensor provides closed-loop control of the injected quantity of fuel for optimum air-fuel mixture, enabling virtually complete combustion to take place. Contaminants in gas and certain atmospheric conditions can drastically shorten the life of any oxygen sensor, therefore they should be checked with every periodic maintenance and changed if necessary. Bosch Part # 13 231.
This item fits the following BMWs:
1988-1991 E30 BMW 325i 325is 325ix 325ic
1992-1995 E36 BMW 318i 318is 318ic 318ti
1992-1995 E36 BMW 325i 325is 325ic M3
1993-1995 E34 BMW 530i
1993-3/1994 E34 BMW 540i
1993-1994 E32 BMW 740i 740il
1988-1994 E32 BMW 750il
1990-1994 E31 BMW 850i 850ci
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).
(E32) 7-Series 1988-1994
Catalytic Converters
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.
