FLOWMASTER 40 series - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GKsport67 · 07-21-2008, 05:09 PM

I'm about to run a NEW set of dual exhaust on my truck. I have the pipes dumping in front of the tires now. If i change the exhaust to exit behind the tire " would there be a different sound"? the mufflers will be FLOWMASTER 40's

1971c20 · 07-21-2008, 05:43 PM

Yea from my experience it will just be deeper, but i would not run flowmasters because they sound great and all but they are the more restrictive choice, if i were you i would run a good set of cherry bombs, thats what i run and i cant keep myself from flooring it

gator2511 · 07-21-2008, 06:11 PM

I have super 40's out the back with an H pipe on my 72. Its loud but I love it and many people have said it sounds awesome!

BLACK AND BLUE 67-72 · 07-21-2008, 06:13 PM

Can't beat the 40 series sound, flow, and performance!!!

70rs/ss · 07-21-2008, 06:14 PM

The further you get the exit from the driver the quieter it is in the truck, but it won't really effect the over all sound. 40's are good mufflers, but are agressive in sound and can be loud inside the cab. If you have them already or want them knowing the sound, cool, if not the 50's series are a good blend, raspy sound, but ,mellower inside at cruise.

As far as restriction, the flows don't really have any, unless of course you compare them to a piece of pipe, or a cherry bomb in this case. Two entirely different things, comparing flow to bombs is like comparing apples to mack trucks. Honestly any muffler choice is a personal choice, but to campare as far as perf goes, I doubt you'll have much like proving one is better than others, since restrctions on the exhaust do not mean more or less performance (unless we are talking stock emisions era vs aftermarket bolt on exhaust)on every vehicle. Some restriction (backpressure is needed).

GKsport67 · 07-21-2008, 06:35 PM

Thanks for the insight guyz,i wanna pay for this ONCE!!! i have a mild cam in it & the mufflers i have on it now dont sound bad to me,but u can see it from side the truck I DON'T LIKE THAT!!

Here' is a pic of the not so KOOL dual!

70rs/ss · 07-21-2008, 07:35 PM

If you are trying to decide on a muffler, you can hear sound clips from most of the manufactures web site's. As for the opinions, we all have them and well let's just say you'll get all kinds of suggestions, find a sound you like and get those.

07-21-2008, 05:09 PM	#1
GKsport67 Registered User Join Date: Jan 2008 Location: Atlanta,Ga Posts: 660	FLOWMASTER 40 series I'm about to run a NEW set of dual exhaust on my truck. I have the pipes dumping in front of the tires now. If i change the exhaust to exit behind the tire " would there be a different sound"? the mufflers will be FLOWMASTER 40's __________________ www.gkautospa.com Like A Rock! http://67-72chevytrucks.com/vboard/s...d.php?t=397153

07-21-2008, 05:43 PM	#2
1971c20 Registered User Join Date: Jul 2008 Location: Vancouver Washin-tin Posts: 168	Re: FLOWMASTER 40 series Yea from my experience it will just be deeper, but i would not run flowmasters because they sound great and all but they are the more restrictive choice, if i were you i would run a good set of cherry bombs, thats what i run and i cant keep myself from flooring it Last edited by 1971c20; 07-21-2008 at 05:43 PM.

07-21-2008, 06:11 PM	#3
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: FLOWMASTER 40 series I have super 40's out the back with an H pipe on my 72. Its loud but I love it and many people have said it sounds awesome!

07-21-2008, 06:13 PM	#4
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: FLOWMASTER 40 series Can't beat the 40 series sound, flow, and performance!!! __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

07-21-2008, 06:14 PM	#5
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: FLOWMASTER 40 series The further you get the exit from the driver the quieter it is in the truck, but it won't really effect the over all sound. 40's are good mufflers, but are agressive in sound and can be loud inside the cab. If you have them already or want them knowing the sound, cool, if not the 50's series are a good blend, raspy sound, but ,mellower inside at cruise. As far as restriction, the flows don't really have any, unless of course you compare them to a piece of pipe, or a cherry bomb in this case. Two entirely different things, comparing flow to bombs is like comparing apples to mack trucks. Honestly any muffler choice is a personal choice, but to campare as far as perf goes, I doubt you'll have much like proving one is better than others, since restrctions on the exhaust do not mean more or less performance (unless we are talking stock emisions era vs aftermarket bolt on exhaust)on every vehicle. Some restriction (backpressure is needed).

07-21-2008, 06:35 PM	#6
GKsport67 Registered User Join Date: Jan 2008 Location: Atlanta,Ga Posts: 660	Re: FLOWMASTER 40 series Thanks for the insight guyz,i wanna pay for this ONCE!!! i have a mild cam in it & the mufflers i have on it now dont sound bad to me,but u can see it from side the truck I DON'T LIKE THAT!! Here' is a pic of the not so KOOL dual! __________________ www.gkautospa.com Like A Rock! http://67-72chevytrucks.com/vboard/s...d.php?t=397153

07-21-2008, 07:35 PM	#7
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	Re: FLOWMASTER 40 series If you are trying to decide on a muffler, you can hear sound clips from most of the manufactures web site's. As for the opinions, we all have them and well let's just say you'll get all kinds of suggestions, find a sound you like and get those.



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