I didnt have to trim anything. there was no rubbing or binding of any kind. as you put it together you may want to twist the pipe along their axis to align it better but this was a very easy job. just hard on the back from leaning over the engine bay was my only complaint.

 

thanks for the nice write up bro, it really helps a lot for DIY peeps

 

nice write up

 

very detailed write up! cookie points for you my man!