'59 Gmc exhaust questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCHRUMGMC · 12-06-2014, 12:41 AM

I would like to go dual exhaust how much does dual normally run, I have a 270 with stock manifolds and hope to do dual

What is the best Muffler?

I like the way Magnaflow sounds, I want something that sounds good

OrrieG · 12-06-2014, 03:33 PM

Usually duals on a six are used with a split manifold to enhance the sound of the opposing firing order between front and back cylinders. If you use the stock manifold, a local muffler shop can give you a quote on making up a split pipe and running duals out the back, in front of the back fenders, etc. Or you can sharpen you welding skills, buy a bunch of staight pipe, bends, etc. and make it you self. My personal experience has been they was not enough savings doing it my self vs. having the pros do it a the local hot rod muffler shop. Haven't had any done for six years but think I spent about $350 on material and installation.

Mufflers are subjective, I use Dynomax others prefer Magnaflox or ?? Best is to just go to a rod meet and listen to what folks have and find one you like and ask. Basically size determines loudness and configuration translates into how throaty, poppy or mellow they are. I have shorter 16" on my Chevelle, but put the longest (24" I think) I could on the truck.

**mr48chev** · 12-06-2014, 04:14 PM

To quote OrrieG : Mufflers are subjective, I use Dynomax others prefer Magnaflox or ?? Best is to just go to a rod meet and listen to what folks have and find one you like and ask.

No one could have said it better than that. It isn't what "we" collectively like it is what "you" personally like.

Speedbumpauto · 12-07-2014, 09:43 AM

If you're going to do it right, go to Clifford Research 6=8 and look at the manifold/header they have for the 270, or go to Speedway and look at the Fenton exhaust manifold.

Russell Ashley · 12-07-2014, 03:30 PM

If you really want it to sound good you need to get a set of headers. Here's a sample from EBay:

http://www.ebay.com/itm/216-235-Chev...f0b524&vxp=mtr

SCHRUMGMC · 12-07-2014, 03:44 PM

Turns out that I don't have a Burnt valve !!! Thank GOD

I'd like to keep original exhaust manifold though?

OrrieG · 12-07-2014, 07:04 PM

here is the most common way to do it with stock manifold.

12-06-2014, 12:41 AM	#1
SCHRUMGMC Registered User Join Date: Dec 2012 Location: North Carolina Posts: 4,989	'59 Gmc exhaust questions I would like to go dual exhaust how much does dual normally run, I have a 270 with stock manifolds and hope to do dual What is the best Muffler? I like the way Magnaflow sounds, I want something that sounds good __________________ 1971 GMC Sierra 1959 GMC 100

12-06-2014, 03:33 PM	#2
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: '59 Gmc exhaust questions Usually duals on a six are used with a split manifold to enhance the sound of the opposing firing order between front and back cylinders. If you use the stock manifold, a local muffler shop can give you a quote on making up a split pipe and running duals out the back, in front of the back fenders, etc. Or you can sharpen you welding skills, buy a bunch of staight pipe, bends, etc. and make it you self. My personal experience has been they was not enough savings doing it my self vs. having the pros do it a the local hot rod muffler shop. Haven't had any done for six years but think I spent about $350 on material and installation. Mufflers are subjective, I use Dynomax others prefer Magnaflox or ?? Best is to just go to a rod meet and listen to what folks have and find one you like and ask. Basically size determines loudness and configuration translates into how throaty, poppy or mellow they are. I have shorter 16" on my Chevelle, but put the longest (24" I think) I could on the truck. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

12-06-2014, 04:14 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,817	Re: '59 Gmc exhaust questions To quote OrrieG : Mufflers are subjective, I use Dynomax others prefer Magnaflox or ?? Best is to just go to a rod meet and listen to what folks have and find one you like and ask. No one could have said it better than that. It isn't what "we" collectively like it is what "you" personally like. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

12-07-2014, 09:43 AM	#4
Speedbumpauto Registered User Join Date: Aug 2011 Location: Tucson, AZ Posts: 917	Re: '59 Gmc exhaust questions If you're going to do it right, go to Clifford Research 6=8 and look at the manifold/header they have for the 270, or go to Speedway and look at the Fenton exhaust manifold.

12-07-2014, 03:30 PM	#5
Russell Ashley Registered User Join Date: May 2010 Location: Lawrenceville, Ga Posts: 2,648	Re: '59 Gmc exhaust questions If you really want it to sound good you need to get a set of headers. Here's a sample from EBay: http://www.ebay.com/itm/216-235-Chev...f0b524&vxp=mtr

12-07-2014, 03:44 PM	#6
SCHRUMGMC Registered User Join Date: Dec 2012 Location: North Carolina Posts: 4,989	Re: '59 Gmc exhaust questions Turns out that I don't have a Burnt valve !!! Thank GOD I'd like to keep original exhaust manifold though? __________________ 1971 GMC Sierra 1959 GMC 100

12-07-2014, 07:04 PM	#7
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: '59 Gmc exhaust questions here is the most common way to do it with stock manifold. Attached Images __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

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