The silencer on my 2011 +4 is MEX1107. That came with the car when new and from what has been said, it is the straight thro’ version. The identifying number plate was on the front, facing towards the road, so easy to read.

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900