got it mounted up tonight with the ofna 086 pipe. the factory header just clear's the rear spring (suspension compressed or released). the installation went beautiful, had to modify the header a little to mount to the engine but other than that it went perfect. I am going to break it in this week, sorry guys just bear with me, i have a 2 yr old a 5 yr old and a wife that works lots of hours. here some pics of it and comparing it to my lrp 30/ dynamite 086 pipe combo. they are both x chassis trucks (i hate the xl look, just imo).