installing at cpc stage 2 on my 2011 m8.not running the cold air intake so i need to extend the tail end of the pipe about 1 1/4 in length and 3/4 of an inch longer where it enetrs the turbo exhaust flange..this is so it will clear the charge tube.my question is by doing this will it effect the back pressure or performance of the pipe.. thanks darren
