I am a little confused here. I am looking for a new exhaust system for my 92 xj. i was looking around rusty's site at the muffler/tailpipe combo's and noticed he was using flowmaster 40 series mufflers with the tail pipes. then I clicked on the link for just the flowmaster muffler itself,and it says "Rusty's does not recommend the Flowmaster 40 series for the Inline 6 motor. The agressive sound of the Flowmaster 40 is really better suited to the V8 engine." what gives? why is he selling it for xj's if it isn't reccommended for xj's? or am I reading to much into it?