Registered Forum User
 500SD
     Posts: 531
 Join Date: Aug 2001
 Location: West Kilbride Ayrshire
 Mood: I can live with backpain!
  
    
     Well,I've just ordered the 50mm tubing as its the only size I could get,I'll figure out the best way to put it all together when it arrives.
 I think the commercial systems for the S4R and S2R are the same,can anyone who has one on their bike measure the internal diameter of the muffler for me?