How much of a performance difference is there between these two types of pipes? I remember reading somewhere there's about 6" of difference in pipe length between the two. Will performance suffer significantly with the stock battery pipe?

Thanks again in advance.

 

In my personal opinion it won't hurt performance. It may be longer than the short route piping but it is also shorter than the stock piping, so that will net results right there. Also the main restriction in the icp is from the lower pipe not the upper. I have the pipe on my car however I did a whole turbo upgrade at the time so I can't really say much about individual performance of it.