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      01-16-2013, 02:53 PM   #21
Private First Class

Drives: 2012 535xi
Join Date: Mar 2012
Location: Toronto

iTrader: (0)

Originally Posted by objectdyed View Post
yes! for a more agressive sound the open flaps are definitive a must have ;-)

normally the flaps opens at a certain rpm!

its very easy to open the flaps, you can just lock/fix them with a little screw. thats it. tooks 5 minutes!

your can also do a different mod if you cut off the hose wich opens the flaps:

but I dont tested it!

but for a better and more agressive sound, the open flaps are a must have
Did you put a screw through the exhaust pipe to block the flap open? Wouldn't that make a hole in the exhaust?

I tried blocking the rubber pipe but the flaps remained closed!