i am trying to figure out what kind of muffler to run on my 02 supercrew 5.4l. i herd about the flo pro twister, but will it help or hurt my performance

 

I replaced plugged cats with magnaflow highflow cats, 3in pipe, and flo pro muffler. I can't say which parts made the biggest difference(probably the new cats), but it was sure a huge improvement. It has a drone at about 60mph in OD (97 5.4, 355ls), but otherwise very pleased.

 

Don't have a reply to your question, I just wanted to say hello to a fellow Niceville, Florida resident. It's a small town, we've probably passed each other on the road a time or two.

Dave

 

I don't have a twister, but one of the MX series and think it's pretty cool. Much better then the Gibson tin can muffler that I had.......