Flowmaster 40's...
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Instructor
Joined: May 2011
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Flowmaster 40's...
My local custom exhaust shop told me they have a flowmaster 40 or I could go with a off brand. They tell me put them side by side and listen to the sound of the finished product that I would know a difference. The off brands are $100.00 cheaper though. I have always loved flowmasters and wanted to go with the 40's. Has anyone heard of or went with the off brand and if so how are they, do you like them.
2nd is the 44's any nicer or louder? They will be put on my 72 sb stock vert. Thanks!
2nd is the 44's any nicer or louder? They will be put on my 72 sb stock vert. Thanks!
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Joined: May 2010
Posts: 54
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From: NC
I can’t say for on a corvette as I was running the 50 series before I went to the sidepipes but I have the 44s on my 02 grand Cherokee. I wouldn’t say that they are all that "loud" as they are deep but take it with a grain of salt because I dont think that the 2.5inch maxflow inserts in my sidepipes are all that loud.
The only objection I have the muffler is that it lost its finish very quickly so I had to pull it off to do a high temp paint on it but that’s not a big deal. I would say if you could take off your cats off while you are under there do it 
The only objection I have the muffler is that it lost its finish very quickly so I had to pull it off to do a high temp paint on it but that’s not a big deal. I would say if you could take off your cats off while you are under there do it
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Joined: Aug 2008
Posts: 99
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From: Houston Tx
i put flowmaster 40s on my 77 a couple months ago. they are loud and have a deep rumble. nothing crazy though. i paid $100 for the pair from summit racing.com. buy them there and then take them to your muffler shop. sounds like they are market them up pretty high if the knock offs are a $100 bucks cheaper.
Melting Slicks
Joined: Feb 2006
Posts: 2,092
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From: Fayetteville Arkansas
I also have a 72 SB 350 with a 4 spd and plan to go with summit headers, 2.5 " pipe back through the flowmaster 40 series. I love the look of the side exhaust but it's not for me on my car.
Sully
Sully
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Joined: Feb 2012
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From: OK
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Drifting
Joined: Jan 2008
Posts: 1,962
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From: Schererville IN
I had Flowmaster 40's with true dual 2.5" out the rear before I went to sidepipes. They were loud and obnoxious. Terrible droan inside the car. Couldn't talk to your passenger. Gave you a headache from the noise on any drive longer than 30 minutes. I've run 50's on previous cars with no issue though. I'd never run 40's again.
My Hookers with STS baffles are more mellow.
Just my $.02.
Go with 50's or something else.
My Hookers with STS baffles are more mellow.
Just my $.02.
Go with 50's or something else.
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Joined: Apr 2011
Posts: 51
Likes: 3
From: Arlington Texas
I have a stock '77 and I put on patriot headers and bought the exhaust kit from summit. That kit comes with manga flows and frankly I didn't like them much. They just didn't 'rumble'. I went to Kenny's here in the Dallas metro plex and he talked me into flowmaster 44s. He said they are quite during cruzing speed, but have that rumble when you hit the gas.
He was right and I love them! I got the black paint to help conceal the exhaust which I really like too. He put on modern chrome vette tips, made them stick out 1.5" and I think it looks great! Go with flowmasters - there's a reason they are #1...
He was right and I love them! I got the black paint to help conceal the exhaust which I really like too. He put on modern chrome vette tips, made them stick out 1.5" and I think it looks great! Go with flowmasters - there's a reason they are #1...
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
i have hooker aero chambers on my 82. bought them new. wanted to try something different. i always had flowmasters. well the sound from the aero chambers has not grown on me so i got some new flowmasters
to replace them. only flowmasters for me
to replace them. only flowmasters for me
Instructor
Joined: Dec 2009
Posts: 195
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From: Chesterfield Virginia
Flowmaster Series 40, Hooker Headers, True Dual 2.5'' pipes w/balance pipe, '73 sb. Sounds better in person, took this with a point and shoot camera, but might give you an idea of what it would sound like.
Steve
http://rides.webshots.com/video/3046...66957211uMqbER
http://rides.webshots.com/video/3067...66957211PHtEpH
Steve
http://rides.webshots.com/video/3046...66957211uMqbER
http://rides.webshots.com/video/3067...66957211PHtEpH
Drifting
Joined: May 2008
Posts: 1,647
Likes: 5
From: Roseville CA
Flowmaster also makes a 40 Series Delta Flow muffler that has virtually no drone. I wished they'd do a better job of marketing these, cause no one seems know they exist. I have them on my 71 454 and they sound great. And have no interior drone.
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Instructor
Joined: May 2011
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Thread Starter
Instructor
Joined: May 2011
Posts: 153
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That is a nice sound! Is the only difference between the 40 series and delta flow the drone?
Drifting
Joined: Nov 2004
Posts: 1,627
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2020 C3 of the Year Finalist - Modified
I have 40's on mine. They sound good, drone is loud around the 1200-2000rpm mark. I have a th350 trans with 3.55's inthe rear so I never hit the drone rpms on the 60+mph hwy speeds.
Here's a video, in car and out shots.
http://www.youtube.com/watch?v=4OzZcf2HYVE
Here's a video, in car and out shots.
http://www.youtube.com/watch?v=4OzZcf2HYVE
Last edited by bluegtp; May 16, 2012 at 01:23 PM.
Drifting
Joined: Aug 2010
Posts: 1,839
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From: nassau co. new york
same here with the 40's.drone,rich deep sound and plenty the attention getter.from electronics class it took way more energy to make a low frequency sound than a high frequency one.that could explain the loss of hp compared to magnaflows.so they say, but the sound is what it's all about.
Drifting
Joined: May 2008
Posts: 1,647
Likes: 5
From: Roseville CA
Found this, I guess it explains it.
Last edited by C6DuffMan; May 19, 2012 at 10:03 AM.