Flowmaster question

Dr Fildo · Apr 26, 2011

I know...everyone has flowmasters. I love them. Problem is, the ones I have are old as dirt and have a few leaks, so I need new. My question is... Back in the day (when I originally put them on the car in '95), there were 2 chamber and 3 chamber flowmasters - Loud, and less loud, respectively. I'm, not sure how they're sold today. American thunder? Super 40's?? Which ones are the loudest, and which are not as loud.

I know this has probably been covered 1000X. Sorry.

97 Hitman V6 · Apr 26, 2011

i got original 40's and their fking loud on my sixer. then at high speeds it tones down.

marq.fcb · Apr 26, 2011

super 10 is loudest

I recommended orginal 40's or super 44

Dr Fildo · Apr 27, 2011

I'm guessing then that the lower the #, the louder the exhaust?? Does it then make sense that the lower the #, the less restrictive on the exhaust system??

98GTnSC · Jun 16, 2011

ive got some 10s i had on my 98GT before i switched to Bassani and now SLP but i love the 10s. always got compliments on them. they were loud and also had that chambered muffler sound. kinda like a cross between a Flowmaster 40 and a resonator(glasspack). it had places to sound deeper like a chambered muffler then got raspy around 2700-3200RPM. i loved them though.

robb15033 · Jun 16, 2011

I have the FM 10's also. Love them. Today they sell the "Original 40" and the "Delta Flow 40". The Original 40 is supposed to be a little louder in and out of the car. The 44 is similar to the 40 but different and you should give a listen to some youtube videos. But generally YES you are right, the lower the number, the less chambers or the louder it is.
BUT- Now they have new products like the Outlaw and the Hushpower and different versions of each, They sound great too!

lutter94 · Jun 16, 2011

50, 60, & 70 Series are 3 Chamber (60 Series is for 4 cyl or 6 cyl)
40 Series Delta Flow, Super 40's, and Super 44's are 2 Chamber (Super 40's are loudest, apparently 40 Series and Super 44's are similar.) I believe Delta Flows are designed to decrease drone.
Super 10's are 1 Chamber

That's all I know.

auto_x5.0 · Jun 17, 2011

I have the american thunder catback and I believe they are just 40 series mufflers. I thought about getting 10 series, but I got SLP loudmouths. From what I've heard they sound about the same down low

Dr Fildo · Jun 21, 2011

The drone is pretty annoying...I think I'm gonna go with Delta flow 40's.

Does Dynamat or other sound deadening material under the carpet help with the drone?