I need your opinion!

[jetaimejsc]

ok so my friend is buying a full exhaust for his Civic Si and he bought a muffler from this shop, its a flowmaster, thats all i know. Well he said since he is buying a full exhaust, that he would sell me his muffler for $50 bucks, i told him that i will buy it if it fits my yaris, he said that it was universal and all that had to be done was to be welded, so im asking ya, Do you guys think its a good idea to buy, will it fit my car? im sorry that i cant provide more information on the muffler or anything like that, if ya need some more information, pm me or reply here the questions that ya might think might help me to ask.