I had a Morgan-tec muffler and found it had too much resonance.
I now have a Magnaflow dual in-dual out - WITH resonators on the back end to take out the nasty snappy noise on acceleration.

Our car does have a short wheel base and very tight space to run pipes, muffler and resonators - but it can be done:




True, power performance would suggest going with two smaller mufflers on each pipe off the header - but the minimal power gain is not worth the terrible racket 3 cylinders would make out of each tip. The dual in dual out muffler I have has an X-pipe in it to cross over the flow to level out the harmonics - and it was still very loud! I had to add small resonator blanks on each pipe after the muffler to take out the high end snap (or ricey sound as some would say). Right now I am very pleased with the results in sound and I think it will perform better than stock with the future supercharger.


cheers.