Originally Posted by buildbright
Ask any 2jzgte tuner single 3" won't lose a dime of power until over 500whp. I will try to post a step by step how to install as well of the downpipe. I have noticed the challenge dp looks very similar to the stock. I am betting BMW will not notice the difference unless they are looking for it.
Nice, Ill be for sure following your writeup. It would be nice if they dont notice
or dont care. Some dealers look the other way unless something is seriously wrong.
I cant wait for a proper tune for this thing. I just want about 50-60 hp. Cobb please hurry up...