are best for mostly street use?40 series or 50 series ? And which flowmaster is quieter 40 series 2 chamber or 50 series 3 chamber?
Need help making a decision.

50 series are quieter.
I have them. They sound amazing!!!

Don't go with the 40 series if you want regular conversation inside. They resonate way to much for my liking. I'm sure I'll probably replace my 40s and go with the 50s. I have heard 70s on a pickup truck and they sounded great.
Jody

Eric,do you have an H-pipe or an X-pipe?to go with those 50's.?

It's an H-pipe. 2.5" Just the A-body pipe kit from Flow-master. Sounds great.

I run 40's with pure dual, no H/X pipe and really like them. They are loud and mean sounding, and have some slight resonance issures at certain rpms like right when I am coming too a stop. But they sound very good, and conversation can easily be had, just with a slight raise in the voice. I just think it makes my sbc sound alot tougher.

I had the 50 delta and liked them alot. This was w/a 454 and 2.5 exhaust. Nice and mild, minimal resonance. No crossover. However, if you go to 3" exhaust and/or more power, I can guarantee these muffs will be too loud!

Flowmaster 40's are nice but......I just took a pair off my 69 and replaced them with Dynomax Hemi turbos. I can hear the radio now.

None. I'm with Cruzin69, Dynomax Hemi's

just a little note.. my trans am lost power on the dyno with flow masters... i went from the flow to a SLP muffler and gained 8rwhp.. it sold me on never putting flows on my car again.. plus they all sound the same now a days.. get something different.. like spintech mufflers or slp.. borla.. just my 2 cents..

i am using 40s definetly the louder of the two but with my exhaust exiting in front of the rear tires with a 2.5" H pipe set up sounds very mean i agree with Bret makes my sb sound pretty sweet but if you are looking at quieter i believe 50s are quieter..... just put an extra layer of sound deadener in the cab ;)

the 40's are to loud...
my 402 el co was a bear on the highway...
to much in the inter of the car..
moved the tail pipes twice didn't really help

Dynomax
Magnaflow
Hooker Aerochambers


One of those 3 and not in order of preference.

All of em outflow flowmasters (true) and all of them sound better (opinion)

Dynomax

All of em outflow flowmasters (true) and all of them sound better (opinion)
I already have the dynomax turbo's on it.With the X-pipe its just too dam quiet.I don't know,maybe I'm just getting used to the sound of the exhaust.Sounds great when I nail it though.:D

if you want obnoxious loud go with dynomax racebullets. Thats what i got, they are through 3 inch pipe and i love it. But im still reasonably young so i can handle it

I have bullets too, and they absolutely scream when you hit the gas. I have an H-pipe at the moment, and I think it sounds like my dad's suburban at idle, so the crossover coming out on monday. I'll probably run the bullets until I get a noise ticket and then go to spintechs or dynomax ovals.

I just ordered the American Thunder exhaust kit (with mufflers) thru Summit for my 70 big block. It has arrived, but I haven't opened the boxes yet.

It is supposed to include the 30 series mufflers. I ordered the 2 1/2 inch pipes. The kit goes all the way to the back and includes the H pipe.

Check out the sound clips on Flowmasters site here:

http://www.flowmastermufflers.com/sound.html

The 30's are supposed to have a similar outside the car sound as the 40's but are quieter inside the car, which is the way I wanted it.

Does anyone have experience with the 30 series?

Don


'70 Fanatic

Niether for me I just istalled 2.5 inch X crossover with Borlas and really like them. I was turned off Flowmaster 40s when I had them on my truck. Ciyld not have a conversation in the cab. They were graet 4 the first six months thatn they grated on me
JMHO

I have the 30's that came in the kit and they are not bad, still loud but not like the 40's. Picking an exhaust sound is like picking a color so you really should hear them yourself.

Mike

I have the American Thunder system on my 69, and it came with 30's too. I would say the sound is very good, nice rumble at idle, especially when you are standing behind the car. When you get on it, again nice big block sound, but not obnoxiously loud. They definitely dont resonate that much in the car..Its somewhat loud when you have your foot into it, but cruising along at 50-60 mph, no interior resonance, decent to have conversation or listen to radio..not annoying at all. I have headers and new carpet with factory type sound deadener.

My car has a lunati cam in it, and believe me when I ran it with open headers, you know it was warmed over..so the 30's take the edge off, no hassles with police or anything like that..but the neighbors will still know you are there..so not too quiet, not too loud..nice.

That being said...I see that Flowmaster has apparently changed the default muffler for this kit for BBC/Chevelles to a Super 40, and the 30 series is no longer used..hmmm.....I have been debating for about a year whether to remove the 30's and go for something a tad more aggressive sounding. I think with the H pipe you could probably get away with a 40 series without it being too loud, but the Super 40 might be a better compromise-maybe that's why Flowmaster made the change??

PM me if you want a sound clip of my car with the 30's that are on it now.

That being said...I see that Flowmaster has apparently changed the default muffler for this kit for BBC/Chevelles to a Super 40, and the 30 series is no longer used..hmmm.....I have been debating for about a year whether to remove the 30's and go for something a tad more aggressive sounding. I think with the H pipe you could probably get away with a 40 series without it being too loud, but the Super 40 might be a better compromise-maybe that's why Flowmaster made the change??


I opened the boxes today and began the install. It looks like the kit must have come with the Super 40's like you said JTM60!

They are a staggard inlet/outlet like the 30's but are black in color. The photos on Flowmaster's site would lead me to believe that is what they are.

Has anyone used these Super 40's? How do they sound INSIDE of the car?

Thanks,
Don


'70 Fanatic

Don..

Well since you have the super 40's, I want to hear YOUR sound clip!!

I got your PM, I will send you a couple clips of mine asap, I just need to get out there and get it started and take them! been meaning to do this, just havent had time yet.

Dynomax
Magnaflow
Hooker Aerochambers


One of those 3 and not in order of preference.

All of em outflow flowmasters (true) and all of them sound better (opinion)

do you have any sound clips better than the ones on their sites? i thought they sounded terrible (no clip for hookers)

dynomax didn't really have a clip for anything relevant to an old school sbc i could find

why dont you guys share some clips?

im working on it..maybe tomorrow!

So you guys are saying my mufflers are 30 series? Yes I ordered the American Thunder kit. I plan on removing the mufflers and installing some Ultraflows.

Those of you that wanted to hear the Super 40's, here's a clip when I had them on my car...

http://media.putfile.com/Chevelle-Flowmaster-Super-40s


That's with a 3" full h-pipe exhaust. The Super 40's are quieter than the original 40 series. They also have a lot less interior drone. I actually wanted something a little louder and not as echoed so I ditched the Super 40's for a pair of Pypes Violators...

http://media.putfile.com/Chevelle-with-Violator-mufflers

I posted some other sound clips and a review of some mufflers in this post... http://www.chevelles.com/forums/showthread.php?t=122287

I love my 40's.But I'm a noise makin p%$*k anyway!!!

I have the full American Thunder system (guess I have the 30's also.) My wife tells me it's louder (outside the car) than my next door neighbors big block 67 Vette with side pipes. My neighbor across the street has 50 series on his 55 with a small block and I can tell every time he starts it. I haven't driven the car further than out the driveway to turn it around and back so I don't know about any resonating in the car yet.

So what are you saying Hopkins, us old guys just can't handle the truth!!

M

I can share a (poor) soundclip of my Magnaflows on my very mild SB400 with an h-pipe. The video doesn't do them justice as they are mildly rumbly at idle, but really begin to cackle at larger throttle openings. They don't sound as throaty in the video as they should and they sound better when the vehicle is moving than just idling and revving in one place but you'll get the idea.

http://heartland.chevelles.net/RCstorage/magnaflowsound.avi

I've got a set of Super 40's on a small block automatic, no h or x pipe, and oem tailpipes that exit at the bumper. I love 'em. Best silly smile value for the dollar. To me it sounds just right. Its on a 2.5" system with headers, and the interior sound is fine for me. My wife, who is my biggest critic, has never mentioned the sound either way, so I take that as a good thing. Daren

slick..those violators sound nice..I think I like them better than the super 40 sound you posted

slick..those violators sound nice..I think I like them better than the super 40 sound you posted

I like them a lot more than the super 40's. In person, the super 40s were just too echoed. I liked the deep tone but the exhaust notes were too muffled, and to be honest, they were too quiet for my taste. The Violators aren't as deep sounding, but they don't have the chambered sound. They are very loud and aggressive outside the car, but surprisingly quiet inside.

40 series

I gotta suggest the 30's. I got them when they came with the kit. Sound's nice at idle, you can hear the cam but nothing too overboard. When you get on it, it gets fairly loud, but with a very nice tone to it. You can have a conversation in the car/outside the car at idle and at cruise and I think that they are the perfect combo. BTW, this is a 2.5" system. There is a clip in my sig. Not the greatest, but it gives you an idea.

Chris

I don't know what series my Flowmasters are,but they are about 14 years old and sound great with 3" leads and 2.5" tailpipes :D

30 series. Mine came with the 3 inch kit.

50's are on Mine and I love 'em. Superb sound at idle, everyone knows you have a muscle car! With the top down or up unless you are really "on the gas" you can have a conversation. Stock manifolds as well. No H, X, pipe at this time.

just a little note.. my trans am lost power on the dyno with flow masters... i went from the flow to a SLP muffler and gained 8rwhp.. it sold me on never putting flows on my car again.. plus they all sound the same now a days.. get something different.. like spintech mufflers or slp.. borla.. just my 2 cents..

Not trying to knock you but the 60 series or whatever Flowmasters are notorious for flowing horribly on F-bodys. Their other models suck as the 40 series flow great. However there are some options out there that flow better.