[Burt69er]

Just a quick question. I'm taking the bike into the dealer tomorrow to get a set of Sil Motor low mount meggaphone exhaust put on. The bike is completely stock and is a 06' 620D.

Since these are slip ons, will I need to modify or dyno for these or should the stock set up be fine??

Any advise would be appreciated.

 

[MonsterHooligan]

they should be fine.

 

[SlowDucTEMP]

MH can sure talk your ear off, eh? ;D
so long as you're not changing the airbox set-up, you shouldn't need any changes... if you are also cutting open airbox to allow higher airflow (beyond a filter change), you should have the air/fuel ratio tweaked by the dealer at a minimum (you may want to have it checked, anyway, since mine was pretty rich from the factory). if you want to go whole hog, install a power commander or similar fuel management computer and have the thing dyno'ed and tuned.