I shopped e-bay and got the FM 10's for $40.00.They sound so sick! I'm thinking I'll get some down the road. The just sound amazing on the 3.8.
So are any of those other options cheaper than the 10's or are they the best bang for you buck?
LilRoushI had slp lm1's dumped on my 5.0 and they sounded completely different than 10 series dumped on my buddies 5.0. So you can't really say that, also, 10 series aren't just an empty chamber like shotgun style mufflers. They are just a single chamber of baffles rather than straight through so they will tone the sound but still be loud.
Every single Mustang will be different. Headers, cats, mid-pipe, 3.73 gears, 4.10 gears will make it different. In my car the drone is very quiet unless for some reason I'm driving at 3K RPM's for extended time. It doesn't resonate to bad inside the car, it's just louder at 3K.How's the drone inside the stang?