A New High Quality Replacement Aluminum 50mm Exhaust Nut - purchase two for a matching set. See installation review by Brook Reams : R75/5 Installation Vehicle Manufacturer: BMW Application: BMW Airhead Models Make / Model: BMW 50/5, R60/5, R60/6, R75/5, R75/6, R90/6, R90S Model Years: 1969 - 1976 Manufacturer Part # 18 11 4 090 270 (See APPLICATION TABLE tab BELOW to verify vehicle fitment) Replace your old worn or damaged exhaust nuts with a classy new looking part!
Use an exhaust nut wrench to loosen and tighten these nuts otherwise you may damage the fins - see Part No EXNut-Wrench758
Do NOT install new nut without first applying copper (not silver) anti-seize on the thread - see our Part No: LOC8008.
NOTE: Exhaust nuts must be spun off every 10,000 miles during a major service for application of antiseize.
When struggling to remove seized nuts, heat them up to 300degF to loosen them.
In extreme cases you may have to cut the nut off being careful not to damaged the thread on the cylinder head.The nut can be cut off with a hack saw or dremel. Cut the nut and only saw down "to the threads" of the head. Now hit a chisel in the cut to try separate the two pieces. If this does not work, then make a second cut on the opposite side of the and use the chisel to separate the nut from the cylinder head.
Use an exhaust nut wrench to loosen and tighten these nuts otherwise you may damage the fins - see Part No EXNut-Wrench758
Do NOT install new nut without first applying copper (not silver) anti-seize on the thread - see our Part No: LOC8008.
NOTE: Exhaust nuts must be spun off every 10,000 miles during a major service for application of antiseize.
When struggling to remove seized nuts, heat them up to 300degF to loosen them.
In extreme cases you may have to cut the nut off being careful not to damaged the thread on the cylinder head.The nut can be cut off with a hack saw or dremel. Cut the nut and only saw down "to the threads" of the head. Now hit a chisel in the cut to try separate the two pieces. If this does not work, then make a second cut on the opposite side of the and use the chisel to separate the nut from the cylinder head.
 |  |  |
| EME Part Number: | EXNut270 |
| BMW Part Number: | 18 11 4 090 270 |
| Model | Year |
| R50/5 (2476) | 08/69-07/73 ECE |
| R60/5 (2476) | 08/69-07/73 ECE |
| R60/6 (2476) | 01/74-05/76 USA |
| R60/6 (2476) | 07/73-06/76 ECE |
| R75/5 (2476) | 08/69-07/80 ECE |
| R75/6 (2476) | 01/74-06/76 USA |
| R75/6 (2476) | 09/73-06/76 ECE |
| R90/6 (2476) | 09/73-06/76 ECE |
| R90/6 (2476) | 01/74-06/76 USA |
| R90S (2476) | 09/73-06/76 ECE |
| R90S (2476) | 01/74-06/76 USA |