sweeet sound....
 

Will do!!! and I'm sure 100% u'll like it so much! really horrible and sweet sound! and "few" hp are not so little...admit it's really not so good from enviromental point of view...but what about the racing cars?! are they all got these filter??? not sure...

if it triggers engine light then its a no go for me

...
 

Imola! no triggers engine lights on mine...dayu slovo! zato zvuchit velikolepno i rivok uvelichilsa!

you are crazy!!! Yup those cats are very expensive.. By the way where did you get this idea from?? Was there another X5 that did that to the cats??

If anyone in North America, driving on public roads, does this, I hope you get caught and locked up. It is incredibly irresponsible IMO.

The OP may have used poor or leaded fuel, or not maintained the emission system, and that could have caused a blockage in the catalytic converters. Such a blockage would make the removal of the catalytic converters seem like a power gain. Properly functioning catalytic converters have very little restriction and will not cause a significant change in power.

wanna post the videos
 

Guys pls advise how I can post/load here Winamp media files?
Was not able to attach them...

try www.megaupload.com

As stated before HP will not be noticable in such a large vehicle. Only Forced Induction ie: Turbo, supercharger will benefit from this mod. Never mind what this will do the enviroment. Come on guys theres more to life then a few unnoticeable HP gains. I know RandomTechnologies Sells High flow cats at the very least go that route.

That should be the #1 reason not to do it,:tsk: it is so sad how some people just don`t really care about the environment .:saad: :damn:

I like Silver's idea - go with the high-flow cats...