I totally agree. For nine hundred dollars it should have slid right on with NO modifications.ad It must have been frustrating/disappointing to have spent your money and then had to deal with this. I am glad you were able to get it to work. Did you contact the vendor and let them know about it? :bash I sure would have.
Just to be clear, the $900 was for more than the "X" pipe. It was for an entire "cat back" system for my C4. I called the manufacturer on the tech line number provided with the documentation, left a message or 2 on their voice mail,and emailed them. No response. But to give credit where credit is due, I had ZERO resonance issues once I got the system installed.
