Registered Forum User
 Bikes: 888. multistrada 1200s sport
    Posts: 33
 Join Date: Dec 2001
 Location: Bucks
  
    
     There should be enough tolerance in the stock ecu.You only need to go the PC3 route is if you are playing around with the intake with different filters etc.
 I'm runng a full Arrow system and it is perfect,with no other mods.Baffes in
 though,its toooooooooo loud with them out!