Best sounding squarebody mufflers?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

thecantaloupeman

Full Access Member
Joined
May 14, 2019
Posts
447
Reaction score
144
Location
US
First Name
Dawson
Truck Year
1978
Truck Model
C20 Silverado Camper Special
Engine Size
350
I've seen that butt crack thing before... The outer layer pf the twin waled exhaust tube has rusted enough to yield to the pressure from a muffler clamp. The inner tube just folds over like this.

I have had good success painting exhaust tubing. I used an aluminum heat paint. Just be sure to degrease the tubes if you want to paint. And if you weld on, full wled or just a tack, remember to crawl back under with the heat paint rattle can and hit the welds.
It's still going to rust, but will in fact take longer. Or you can clean up rusty shadows that will eventually return and hit with the paint. Depends how much you love the underside of your truck!
Alright well im going to see what I can do to minimize the buttcrack. Maybe I can bend it back into shape somehow. In the meantime I prefer to clamp on the exhaust since I'm not sure if its the sound I want yet. Once I figure that out I will probably weld it together.
 

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
1,742
Reaction score
3,753
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
See how far that butt crack goes in, if its only a few inches just sawzall it along the length and then should be able to twist it out.

As for paint I have had pretty good luck with rustoleums BBQ paint.
You must be registered for see images attach
 

80BrownK10

Full Access Member
Joined
Oct 22, 2019
Posts
1,878
Reaction score
1,240
Location
Greenwood, SC
First Name
Nate
Truck Year
1980
Truck Model
K10
Engine Size
350
Alright well im going to see what I can do to minimize the buttcrack. Maybe I can bend it back into shape somehow. In the meantime I prefer to clamp on the exhaust since I'm not sure if its the sound I want yet. Once I figure that out I will probably weld it together.
Get a tail pipe expander to get that folded over thing stretched back round
 

thecantaloupeman

Full Access Member
Joined
May 14, 2019
Posts
447
Reaction score
144
Location
US
First Name
Dawson
Truck Year
1978
Truck Model
C20 Silverado Camper Special
Engine Size
350
Get a tail pipe expander to get that folded over thing stretched back round
I'll look into that thanks!

I just realized though, the muffler that I bought is straight and the old one was offset. How can I get it to fit?
 

80BrownK10

Full Access Member
Joined
Oct 22, 2019
Posts
1,878
Reaction score
1,240
Location
Greenwood, SC
First Name
Nate
Truck Year
1980
Truck Model
K10
Engine Size
350
I'll look into that thanks!

I just realized though, the muffler that I bought is straight and the old one was offset. How can I get it to fit?
Return it for proper alignment otherwise your going to have to cut more tailpipe out and get one of those ghetto flexy exhaust pipes and we're getting real ghetto at this point. May as well break out the cost hangers to hang it all up too.
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,603
Reaction score
24,050
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
Return it for proper alignment otherwise your going to have to cut more tailpipe out and get one of those ghetto flexy exhaust pipes and we're getting real ghetto at this point. May as well break out the cost hangers to hang it all up too.
Hey dont go stealing my hangers! Lol ive actualy used coat hangers.
 

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
10,223
Reaction score
14,579
Location
Right where I am
First Name
Bagoomba
Truck Year
1981, 1965
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s; 65-C20 with 4:57 gears and Borg Warner Overdrive
Engine Size
Carb'ed Vortec 350; 1972 L48 350
I'll look into that thanks!

I just realized though, the muffler that I bought is straight and the old one was offset. How can I get it to fit?

Take it to an exhaust shop......
 

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
10,223
Reaction score
14,579
Location
Right where I am
First Name
Bagoomba
Truck Year
1981, 1965
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s; 65-C20 with 4:57 gears and Borg Warner Overdrive
Engine Size
Carb'ed Vortec 350; 1972 L48 350
Return it for proper alignment otherwise your going to have to cut more tailpipe out and get one of those ghetto flexy exhaust pipes and we're getting real ghetto at this point. May as well break out the cost hangers to hang it all up too.

No you won't. An exhaust shop can simply make the cuts and weld it. The muffler would already be installed and all of this discussion moot if he'd just taken it in right after getting the glasspack.
 

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
10,223
Reaction score
14,579
Location
Right where I am
First Name
Bagoomba
Truck Year
1981, 1965
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s; 65-C20 with 4:57 gears and Borg Warner Overdrive
Engine Size
Carb'ed Vortec 350; 1972 L48 350
I thought I had pictures but they were on the sd card in my phone that got stolen.

Take it to an exhaust shop, this is what they can do.
You must be registered for see images attach




You must be registered for see images attach




You must be registered for see images attach
 

80BrownK10

Full Access Member
Joined
Oct 22, 2019
Posts
1,878
Reaction score
1,240
Location
Greenwood, SC
First Name
Nate
Truck Year
1980
Truck Model
K10
Engine Size
350
No you won't. An exhaust shop can simply make the cuts and weld it. The muffler would already be installed and all of this discussion moot if he'd just taken it in right after getting the glasspack.
I agree an exhaust shop can easily do it. He has some reservation about taking it to a shop for some reason, that's why I said how he could do it.

I agree, nothing discussed yet would be any problem for a shop that can do exhaust.
 

thecantaloupeman

Full Access Member
Joined
May 14, 2019
Posts
447
Reaction score
144
Location
US
First Name
Dawson
Truck Year
1978
Truck Model
C20 Silverado Camper Special
Engine Size
350
I agree an exhaust shop can easily do it. He has some reservation about taking it to a shop for some reason, that's why I said how he could do it.

I agree, nothing discussed yet would be any problem for a shop that can do exhaust.
Well I just discovered someone across the street form me died of coronavirus so I'm trying my best to stay home. I'd also rather clamp in the muffler rather than welding it in because I'm not 100% sure if I'll like the sound. I also doubt any local exhaust shops are doing work at the moment.
 

80BrownK10

Full Access Member
Joined
Oct 22, 2019
Posts
1,878
Reaction score
1,240
Location
Greenwood, SC
First Name
Nate
Truck Year
1980
Truck Model
K10
Engine Size
350
Well I just discovered someone across the street form me died of coronavirus so I'm trying my best to stay home. I'd also rather clamp in the muffler rather than welding it in because I'm not 100% sure if I'll like the sound. I also doubt any local exhaust shops are doing work at the moment.
That's understandable. You can do what I said with flexible pipe till you decide if you like the sound or want to have it professionally installed
 

78C10BigTen

Full Access Member
Joined
Apr 12, 2017
Posts
15,603
Reaction score
24,050
Location
pennsylvannia
First Name
Ted
Truck Year
1978
Truck Model
C10 BIG TEN
Engine Size
350
Band clamps also work nice for temporary placement, if you dont like it they come right back off, no crushed pipe either
 

Latest posts

Forum statistics

Threads
42,190
Posts
911,005
Members
33,685
Latest member
rickybobby69
Top