The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-19-2017, 08:49 PM   #1
ufbugman
Registered User
 
Join Date: Apr 2013
Location: High springs Florida
Posts: 174
Need suggestion on mufflers

I'm needing to replace my Mufflers (gas packs) as there just too loud !.

1971 350 with headers and exhaust exits in front of rear tires. So need some suggestion on mufflers...something quiet but still sound like it's got balls
ufbugman is offline   Reply With Quote
Old 02-19-2017, 09:14 PM   #2
B. W.
Registered User
 
B. W.'s Avatar
 
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
Re: Need suggestion on mufflers

Probably not much quieter but pretty cheap! Thrush 17656, 2.5" in & out. Flowmaster knockoffs. Paid $35.00 each.
Attached Images
 
B. W. is offline   Reply With Quote
Old 02-19-2017, 09:19 PM   #3
davepl
Registered User
 
davepl's Avatar
 
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
Re: Need suggestion on mufflers

I have the big long Dynomax on all of my big blocks, both with and without headers. I like them because they're load at WOT but quiet and no drone at idle and cruise.

In fact on the truck with exhaust manifolds and the 402 I don't think you can hear the exhaust sitting at a light. That might be too quiet for you, but it's perfect for me. Then if you get into the throttle the sound wakes right up.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
davepl is offline   Reply With Quote
Old 02-19-2017, 09:25 PM   #4
Hack71
Registered User
 
Hack71's Avatar
 
Join Date: Feb 2015
Location: Pollocksville, North Carolina
Posts: 180
Thumbs up Re: Need suggestion on mufflers

I just replaced my glass packs that exited in front of the rear wheels with Flowmaster 40's behind the rear wheels. Big improvement not sure if it was all the muffler or that I went over the axle and out the sides behind the wheel.
these mufflers seem to be a tighter crisper sound then glass packs, not to mention I can now hold on a conversation at 65mph!
__________________
http://67-72chevytrucks.com/vboard/s...d.php?t=693490Cheyenne, AKA "Spare Change" Hack71 Build
Hack71 is offline   Reply With Quote
Old 02-19-2017, 09:44 PM   #5
garyd1961
Registered User
 
Join Date: May 2016
Location: Henderson NC
Posts: 975
Re: Need suggestion on mufflers

Quote:
Originally Posted by B. W. View Post
Probably not much quieter but pretty cheap! Thrush 17656, 2.5" in & out. Flowmaster knockoffs. Paid $35.00 each.
Exactly hat I have^. You might want to run them all the way out the back also. I have a vortec 350 crate motor in my 70 long bed with headers and the thrust mufflers. They are really quiet until you give it some gas, cruising along you can hardly hear them but they get loud when you accelerate.

Actually I have 17659, the only difference is mine are offset on the intake side and exhaust side.
https://www.summitracing.com/parts/wlk-17659/reviews/
No matter what you get I would consider running them out the back though.

Last edited by garyd1961; 02-19-2017 at 09:56 PM.
garyd1961 is offline   Reply With Quote
Old 02-19-2017, 09:48 PM   #6
ufbugman
Registered User
 
Join Date: Apr 2013
Location: High springs Florida
Posts: 174
Re: Need suggestion on mufflers

My Gas tank is under the bed, (69 Camino) fills under tag. so want to keep it away from gas tank.
ufbugman is offline   Reply With Quote
Old 02-19-2017, 09:58 PM   #7
70cst
Senior Member
 
70cst's Avatar
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,339
Re: Need suggestion on mufflers

I have SpinTech ...


http://www.spintechmufflers.com/muff...rs/cat_14.html
__________________
A husband can be right...or...A husband can be happy.

67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.

1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc

JOHN 17:3...The better side of "LIFE"


Remember: Everyday is a good day...Some are just gooder!
70cst is offline   Reply With Quote
Old 02-19-2017, 10:00 PM   #8
garyd1961
Registered User
 
Join Date: May 2016
Location: Henderson NC
Posts: 975
Re: Need suggestion on mufflers

Quote:
Originally Posted by ufbugman View Post
My Gas tank is under the bed, (69 Camino) fills under tag. so want to keep it away from gas tank.
I have owned several cars over the years with a tank like that and factory duels. It shouldn't be a problem, a lot of the modern day cars have the exhaust run around the tank.
garyd1961 is offline   Reply With Quote
Old 02-19-2017, 10:04 PM   #9
davischevy
Senior Member

 
davischevy's Avatar
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,786
Re: Need suggestion on mufflers

My son in law just went down and had the "turbo" muffler the shop stocked installed. It sounds good and not too loud and not too pricey.
__________________
other Larry


Build thread, Arkansas K10
https://67-72chevytrucks.com/vboard/...=755797&page=5





The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.
davischevy is offline   Reply With Quote
Old 02-19-2017, 10:22 PM   #10
jessemthompson
Registered User
 
Join Date: Nov 2011
Location: Williamsburg, VA
Posts: 955
Re: Need suggestion on mufflers

I enjoy my spin techs. Tame at idle and wild at full throttle.
jessemthompson is offline   Reply With Quote
Old 02-19-2017, 10:38 PM   #11
Mike C
Registered User
 
Mike C's Avatar
 
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
Re: Need suggestion on mufflers

DynoMax turbo mufflers. 20" case Hemi if you want extra quiet. What I have on my Jimmy and bought for my short bed as well.
__________________
44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
Mike C is offline   Reply With Quote
Old 02-19-2017, 10:50 PM   #12
88Stanger
Registered User
 
88Stanger's Avatar
 
Join Date: Mar 2015
Location: Washington State
Posts: 1,644
Re: Need suggestion on mufflers

Flowmaster all the way...
88Stanger is offline   Reply With Quote
Old 02-19-2017, 11:44 PM   #13
B. W.
Registered User
 
B. W.'s Avatar
 
Join Date: Nov 2014
Location: Bigfork, Montana
Posts: 1,137
Re: Need suggestion on mufflers

Quote:
Originally Posted by garyd1961 View Post
Exactly hat I have^. You might want to run them all the way out the back also. I have a vortec 350 crate motor in my 70 long bed with headers and the thrust mufflers. They are really quiet until you give it some gas, cruising along you can hardly hear them but they get loud when you accelerate.

Actually I have 17659, the only difference is mine are offset on the intake side and exhaust side.
https://www.summitracing.com/parts/wlk-17659/reviews/
No matter what you get I would consider running them out the back though.
I'd like to run them out but for now I'm just dumping them, I might even try your offset ones. I don't have much clearance on my elec. fuel pump maybe the offset would help.
B. W. is offline   Reply With Quote
Old 02-20-2017, 02:01 AM   #14
71ChevySS(straight6)
Registered User
 
Join Date: Mar 2013
Location: McPherson, KS
Posts: 96
Re: Need suggestion on mufflers

I have pretty generic turbo mufflers on my truck as well - Xlerator is the brand, I think the Big Max series, and they sound good. My 250 has dual headers and true dual exhaust, 2.5" pipe to 45*s out behind the tires. Sounds really, really good - have had more than one person make a comment that it doesn't even sound like a six-cylinder.
__________________
'71 Custom-10 2wd longbed, 250 inline-6, NP 435 four-speed. Medium Bronze Iridescent. Farm truck deluxe.

Rat rod build: 1949 Crosley Station Wagon body on 1993 Dodge D350 chassis, Cadillac 500 powerplant.
71ChevySS(straight6) is offline   Reply With Quote
Old 02-22-2017, 12:21 AM   #15
Z10
Registered User
 
Z10's Avatar
 
Join Date: Aug 2012
Location: Midland, TX
Posts: 1,267
Re: Need suggestion on mufflers

MagnaFlows stainless with cats. Wife loves the no stink exhaust.
Attached Images
   
__________________
1969 RS/SS Z10 Camaro Pace coupe
1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218
1979 Mazda RX7
1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary
1999 Honda Valkyrie
2006 Corvette Z06
2010 BMW 650i
Z10 is offline   Reply With Quote
Old 02-22-2017, 12:40 AM   #16
TheCougarine
Registered User
 
TheCougarine's Avatar
 
Join Date: Sep 2014
Location: Johnson City TN
Posts: 311
Re: Need suggestion on mufflers

Not the cheapest but I loved my Porter mufflers I had on my 71. They had a great old school sound but quieted right down on the highway. Thats what I plan to put on my TA when I redo its exhaust.
TheCougarine is offline   Reply With Quote
Old 02-22-2017, 02:17 PM   #17
boraxman
Keepin an eye out
 
boraxman's Avatar
 
Join Date: Feb 2003
Location: So.Cal
Posts: 3,921
Re: Need suggestion on mufflers

Magnaflow's here...Like em/
__________________
1970 Chevy C10 SWB 5.3
1996 Toyota Tacoma SR5 4x4
2007 Vespa GTS 250 Scooter
ZIP 91351
boraxman is offline   Reply With Quote
Old 02-22-2017, 05:19 PM   #18
Tdrcreyn4
Registered User
 
Tdrcreyn4's Avatar
 
Join Date: Aug 2013
Location: Atlanta, GA
Posts: 702
Re: Need suggestion on mufflers

Subbed
__________________
1968 C10 292/3 spd - sold
1969 K10 350/3 spd/205 - sold
1971 K5 350/4 spd/ 205 - sold
1970 K20 350/350/205 - sold
1969 K20 396/400/205 - work in process
Tdrcreyn4 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:57 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com