No.
Not really! lol
Car muffler far too large, for starters.
It is not the open-ness of the pipe that makes it work, but the growing taper of the cone, then the chamber area, and very importantly, the cone that closes back down and the small stinger out the back end.
THEN, getting a suitable muffler on the end of an Xchamber that will quiet it, without stifling the hp increase, is a real trick, also.
The vendors who advertise here all carry some sort of Xchamber for the mabs.
They are possibly the 2nd best improvement to an HT.
...1st being a hub adapter to get rid of the rag joint.
rc
lol and by golly, be sure to get a 2nd opinion on everything I say! lol