which mufflers? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my 85 gmc · 12-05-2005, 01:17 AM

My 85 sierra classic currently has 2.5 inch duals with flo-pro mufflers(14 inch cases) and an H-pipe the truck has a stock 350 motor. My question is which mufflers would you suggest for a deeper and mellower sound because my current mufflers are to damn loud for my liking?
Some people suggested Dynomax Hemi Super Turbos but after looking at these I'am little concerned how long they would last. Would certain models of Flowmaster or Magnaflow be a better choice?

Thanks Rob

Russell · 12-05-2005, 01:27 AM

I'm having the same problem -- used to think the Flo Pros were the best thing since sliced bread, but now that I've got my truck running again, dang she is loud!

I'm thinking I'm going to install a set of glass packs infront of the Flo pros, and see if that is able to make it a bit quieter.

84 400 · 12-05-2005, 02:46 AM

u could go super 40's fom flowmaster. I have the 50's but the cab drone is bad. they have a nice low sound and i hear the 40's are better in the cab. Just don't go cherrie bomb or spin tech if u want them quiet

thats my 2 censts any way

my 85 gmc · 12-05-2005, 03:00 AM

I must be getting older because the noise is getting on my nerves and since I put the truck away for the winter this is something I would like to fix over the winter. Some people suggest Magnaflow over Flowmaster? Some people suggested Dynomax Hemi Super turbos but personally these muffler don't look like they would last very long. How much does a larger body muffler help this problem? Rob

bigarmzz · 12-05-2005, 08:26 AM

i love the sound of flowmaster 40's....i even like the "drone" sounds in the cab...

...must just be me, but it's like music to my ears

Trimman · 12-05-2005, 09:59 AM

I just put flowmaster 70's on mine. I had 40's but couldn't even talk on the phone. Luckily my neigbor just put 50's on his 78 GMC they were too loud for me. The 70's still have a low rumble but are very quiet in the cab. I hear the carb open up instead of the exhaust when I floor it. The 70's are twice as long as the 40's so you nead to cheak for fit.

stepside454 · 12-05-2005, 12:04 PM

Ive got Dynomax Super Turbos on mine I love how they sound personally. Ive had em on there for 4 years...I dont drive it year around, so I cant really tell you how well they do in year around conditions, but I really like em personally

**Captkaos** · 12-05-2005, 12:23 PM

I ran Dynomax Super Turbos on my truck with a 454, it wasn't loud at all and they are still good. They were driven on there for about 6-7 years.

live85 · 12-05-2005, 02:26 PM

Hey Chris, I have Dynomax super turbos as well. Maybe you can elaborate on how they sound with a 350 since you've heard mine a million times or so. (headers, straight duals, no converters, no H pipe)

piecesparts · 12-05-2005, 06:45 PM

I have Flowmasters on my truck and then I put some Dynomat in my cab, eliminated the drone and I still get the rumble when I drive.

TEAM THC · 12-05-2005, 07:09 PM

For My Tast I Like To Hear My Exhaust In The Cab, Not Loud , But That Nice Resinating You Get At A Certin Rpm With Flowmasters.
Any Glasspacks Are Way To Loud For Me. Also A Tapered Or Megaphone Shaped Tip Can Give You Alittle More Volume, And Still Not Be To Loud.

**swervin ervin** · 12-05-2005, 08:56 PM

Oh, I didn't notice the new guy from Birmingham.

And, you know Chris. Must be nice to be around where you can talk with him whenever you feel like it. One great guy to talk with BTW.

I know I'm getting old. My ringing ears can't stand the noise anymore. I have went back to stock mufflers. I'm now running NAPA Quietflows. With my combination of cam, headers, dual 2.5" x pipe, etc., it sounds really nice. Not stock sounding but still not loud. Sort of reminds me of the way 70's performance cars sounded from the factory. Now I can listen to my tunes and not have to crank it up like a teenager just to hear them.

my 85 gmc · 12-06-2005, 12:25 AM

Thanks for input on the mufflers guys, I don't drive my truck year around thanks to the canadian winters. My concern with Dynomax was how long they would last also has anyone tried magnaflow mufflers. Rob

**Captkaos** · 12-06-2005, 12:28 PM

Quote:

Originally Posted by swervin ervin

Oh, I didn't notice the new guy from Birmingham.

And, you know Chris. Must be nice to be around where you can talk with him whenever you feel like it. One great guy to talk with BTW.

Thanks Mike! I appreciate that. Yeah, live85 lives in the same neighborhood as I do. I like the sound of his also.

jimfulco · 12-06-2005, 02:04 AM

The Super Turbos have a lifetime warranty, if that means anything.

79BIG10 · 12-06-2005, 02:41 AM

I've ran 40 Series with my X pipe and now I have Aero Chambers and they are my favorite of all I've ran so far.

blood62 · 12-06-2005, 03:09 AM

any run edelbrock mufflers yet i was just wondering how they sound

woody96 · 12-06-2005, 10:26 AM

Same here, anyone run the Edelbrock RPM's??

JustOneTruck · 12-06-2005, 01:51 PM

hey i like the deep tone low and mean sound I was tuning my 73 350 and tried the mufflers up close to the headers and way back like at the bumper . It seamed to me that the mufflers way out back by the bumper were the deepest sound But looks made me put them in front of the rear end and I put 3 inch pipes on out to the side corners the rest was 2.5 . no h pipe ....... Here is a web site for sound of Flowmasters site .http://www.flowmastermufflers.com/sound.html copy it and past to get their.

gldevall · 12-06-2005, 10:25 PM

I think I'm about to change my flows to some Dynomax bullets. Anybody ever heard them? Also, it's not my DD anymore...hell it hasn't even been cranked in about 5 months.

79BIG10 · 12-07-2005, 12:26 AM

82BlackBeast had the Edelbrock mufflers on his truck (not sure if he sold it yet or not). I rode with him a couple times in his truck and they sounded good. Not sure what model they were though. Plus he had a 406 small block worked over that helped it out alot as well.

my 85 gmc · 12-07-2005, 12:37 AM

Thanks again for all the input. The guy at the local speed shop suggested Magnaflow but I,ve only heard these on cat-back systems. I'am not sure but the 2.5 inch duals on a stock 350 make my current system louder as well. How much does the size of the muffler affect the noise level?

12-05-2005, 01:17 AM	#1
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	which mufflers? My 85 sierra classic currently has 2.5 inch duals with flo-pro mufflers(14 inch cases) and an H-pipe the truck has a stock 350 motor. My question is which mufflers would you suggest for a deeper and mellower sound because my current mufflers are to damn loud for my liking? Some people suggested Dynomax Hemi Super Turbos but after looking at these I'am little concerned how long they would last. Would certain models of Flowmaster or Magnaflow be a better choice? Thanks Rob

12-05-2005, 01:27 AM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Re: which mufflers? I'm having the same problem -- used to think the Flo Pros were the best thing since sliced bread, but now that I've got my truck running again, dang she is loud! I'm thinking I'm going to install a set of glass packs infront of the Flo pros, and see if that is able to make it a bit quieter. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

12-05-2005, 02:46 AM	#3
84 400 Sb 400 club Join Date: Nov 2005 Location: NH / MA Posts: 2,746	Re: which mufflers? u could go super 40's fom flowmaster. I have the 50's but the cab drone is bad. they have a nice low sound and i hear the 40's are better in the cab. Just don't go cherrie bomb or spin tech if u want them quiet thats my 2 censts any way __________________ 1984 chevy c10, built 400sb,.(SOLD) 77 K10 Project / daily driver "The Grinch" http://67-72chevytrucks.com/vboard/s...d.php?t=318363 1956 Willys Wagon (327 chevy) Project (Now Buick 225) 1980 Corvette L-48 4 speed 1992 Mustang GT built 5.0 5 speed 1985 C10 LWB Sold 1982 K10 SWB plow truck Parted out 1986 D30 M1028 fire brush truck Parted out

12-05-2005, 03:00 AM	#4
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	Re: which mufflers? I must be getting older because the noise is getting on my nerves and since I put the truck away for the winter this is something I would like to fix over the winter. Some people suggest Magnaflow over Flowmaster? Some people suggested Dynomax Hemi Super turbos but personally these muffler don't look like they would last very long. How much does a larger body muffler help this problem? Rob

12-05-2005, 08:26 AM	#5
bigarmzz Registered User Join Date: Sep 2004 Location: Elkins, West Virginia Posts: 2,542	Re: which mufflers? i love the sound of flowmaster 40's....i even like the "drone" sounds in the cab... ...must just be me, but it's like music to my ears __________________ 1987 350 TBI lowered 5/7

12-05-2005, 09:59 AM	#6
Trimman Registered User Join Date: Jan 2005 Location: Hixson TN. Posts: 74	Re: which mufflers? I just put flowmaster 70's on mine. I had 40's but couldn't even talk on the phone. Luckily my neigbor just put 50's on his 78 GMC they were too loud for me. The 70's still have a low rumble but are very quiet in the cab. I hear the carb open up instead of the exhaust when I floor it. The 70's are twice as long as the 40's so you nead to cheak for fit. __________________ 82 C-10 Scottsdale LB owned since 89 350 crate vortec heads Crane 1.6 full rollers edelbrock 1406 edelbrock performer eps intake dynomax headers/flowmaster 70's BTO 700r4 level 3 custom 2 piece driveshaft 12 bolt gov loc w/3.08

12-05-2005, 12:04 PM	#7
stepside454 Registered User Join Date: Nov 2003 Location: st. louis area Posts: 1,551	Re: which mufflers? Ive got Dynomax Super Turbos on mine I love how they sound personally. Ive had em on there for 4 years...I dont drive it year around, so I cant really tell you how well they do in year around conditions, but I really like em personally __________________ 75 GMC C-15 short/step factory 454, lowered

12-05-2005, 12:23 PM	#8
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Re: which mufflers? I ran Dynomax Super Turbos on my truck with a 454, it wasn't loud at all and they are still good. They were driven on there for about 6-7 years. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

12-05-2005, 02:26 PM	#9
live85 Registered User Join Date: Dec 1999 Location: Minor, AL Posts: 91	Re: which mufflers? Hey Chris, I have Dynomax super turbos as well. Maybe you can elaborate on how they sound with a 350 since you've heard mine a million times or so. (headers, straight duals, no converters, no H pipe) __________________ Mike 1985 White Custom Deluxe LWB Early 70's 350 / stock turbo 350 2.73 open differential 10 bolt (yeehaw) Priceless sentimental value

12-05-2005, 06:45 PM	#10
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: which mufflers? I have Flowmasters on my truck and then I put some Dynomat in my cab, eliminated the drone and I still get the rumble when I drive.

12-05-2005, 07:09 PM	#11
TEAM THC CUSTOM CHEVY FIEND Join Date: Jul 2005 Location: CHICO CA Posts: 227	Re: which mufflers? For My Tast I Like To Hear My Exhaust In The Cab, Not Loud , But That Nice Resinating You Get At A Certin Rpm With Flowmasters. Any Glasspacks Are Way To Loud For Me. Also A Tapered Or Megaphone Shaped Tip Can Give You Alittle More Volume, And Still Not Be To Loud.

12-05-2005, 08:56 PM	#12
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Re: which mufflers? Oh, I didn't notice the new guy from Birmingham. And, you know Chris. Must be nice to be around where you can talk with him whenever you feel like it. One great guy to talk with BTW. I know I'm getting old. My ringing ears can't stand the noise anymore. I have went back to stock mufflers. I'm now running NAPA Quietflows. With my combination of cam, headers, dual 2.5" x pipe, etc., it sounds really nice. Not stock sounding but still not loud. Sort of reminds me of the way 70's performance cars sounded from the factory. Now I can listen to my tunes and not have to crank it up like a teenager just to hear them. __________________ Mike 1985 Chevy C-10

12-06-2005, 12:25 AM	#13
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	Re: which mufflers? Thanks for input on the mufflers guys, I don't drive my truck year around thanks to the canadian winters. My concern with Dynomax was how long they would last also has anyone tried magnaflow mufflers. Rob

12-06-2005, 02:04 AM	#15
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Re: which mufflers? The Super Turbos have a lifetime warranty, if that means anything.

12-06-2005, 02:41 AM	#16
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: which mufflers? I've ran 40 Series with my X pipe and now I have Aero Chambers and they are my favorite of all I've ran so far. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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12-06-2005, 03:09 AM	#17
blood62 Registered User Join Date: Oct 2004 Location: cape cod mass Posts: 65	Re: which mufflers? any run edelbrock mufflers yet i was just wondering how they sound

12-06-2005, 10:26 AM	#18
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Re: which mufflers? Same here, anyone run the Edelbrock RPM's?? __________________ "Fighting for our freedoms....."

12-06-2005, 01:51 PM	#19
JustOneTruck Registered User Join Date: Feb 2005 Posts: 88	Re: which mufflers? hey i like the deep tone low and mean sound I was tuning my 73 350 and tried the mufflers up close to the headers and way back like at the bumper . It seamed to me that the mufflers way out back by the bumper were the deepest sound But looks made me put them in front of the rear end and I put 3 inch pipes on out to the side corners the rest was 2.5 . no h pipe ....... Here is a web site for sound of Flowmasters site .http://www.flowmastermufflers.com/sound.html copy it and past to get their.

12-06-2005, 10:25 PM	#20
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	Re: which mufflers? I think I'm about to change my flows to some Dynomax bullets. Anybody ever heard them? Also, it's not my DD anymore...hell it hasn't even been cranked in about 5 months. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

12-07-2005, 12:26 AM	#21
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: which mufflers? 82BlackBeast had the Edelbrock mufflers on his truck (not sure if he sold it yet or not). I rode with him a couple times in his truck and they sounded good. Not sure what model they were though. Plus he had a 406 small block worked over that helped it out alot as well. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

12-07-2005, 12:37 AM	#22
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	Re: which mufflers? Thanks again for all the input. The guy at the local speed shop suggested Magnaflow but I,ve only heard these on cat-back systems. I'am not sure but the 2.5 inch duals on a stock 350 make my current system louder as well. How much does the size of the muffler affect the noise level?

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