Suppose to be is correct..but their NOT!!..friend of mine put them on his '70 dart,had a problem with the 2 center tubes on the driverside hitting the streering column,he had to add a few shims to get them to clear,
That's because the engine wasn't located correctly to begin with. Same thing happens with tti headers. It's sloppy car building tolerance and years of use that you refuse to accept.
Did the tube touch the pan... NO! An air gap is all you need and it's not going to heat up the oil because the oil moves so quickly in the system.
Making mountains out of mole hills.
It's not ok for the chinese to rip someones basic design like some on this board complain about, but, it is for a US company... interesting. A little reverse engineering does them good.