Since I have no Lambda system, replaced O2 sensor with flanged bolt cut flush with interior of bung. Remember wondering how badly it restricted exhaust flow. Is surprisingly large relative to SINGLE common exhaust pipe. What do you think intrusion is: 25% to 33%? Gave my sensor away so I can't measure it anymore... Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote: > It's amazing how different the exhaust sounds if you forget to screw the > lambda sensor in... (been there, got the T-shirt.... and have the > embrassing moment on video!) > > Martin > > David Teitelbaum wrote: > > >There is no quick bolt-on thing that will improve performance much. > >The engine package is a very engineered, balanced system. If you want > >to change the sound of the exhaust there are some modifacations you > >can do but don't expect much. > >David Teitelbaum > >vin 10757 > > > > > >