Installing mufflers, does it matter which way? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

northerngmc · 08-31-2007, 10:57 PM

Ring Ring, Longhorn man are you there!

I am installing new Walker mufflers on my 69 GMC. They are not marked with a direction flow. Does it matter which way the exhaust goes through them?

They do have an 'A' and a 'B' each stamped on one end. I am thinking 'A' towards the front and 'B' end will have the exhaust coming out.

Any thoughts?

st1x10 · 08-31-2007, 10:59 PM

A before B makes sense to me. A in, B out.

wibilly · 08-31-2007, 11:16 PM

the pipe diamiter should be just a little bigger on the front. front id should be the same as rear od.

northerngmc · 08-31-2007, 11:27 PM

Pipe is the same front and rear, I measured with my calipers, 2 1/4 inch inside diameter.

They are Walker universal fit mufflers.

corn · 09-01-2007, 01:13 AM

Universal mufflers are usually reversable. Are they round or oval?

northerngmc · 09-01-2007, 11:32 AM

Oval

08-31-2007, 10:57 PM	#1
northerngmc Registered User Join Date: Jan 2004 Location: Whitehorse YK Canada Posts: 2,651	Installing mufflers, does it matter which way? Ring Ring, Longhorn man are you there! I am installing new Walker mufflers on my 69 GMC. They are not marked with a direction flow. Does it matter which way the exhaust goes through them? They do have an 'A' and a 'B' each stamped on one end. I am thinking 'A' towards the front and 'B' end will have the exhaust coming out. Any thoughts? __________________ Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is!

08-31-2007, 10:59 PM	#2
st1x10 Registered User Join Date: Feb 2006 Location: Oklahoma City Posts: 588	Re: Installing mufflers, does it matter which way? A before B makes sense to me. A in, B out. __________________ 1970 Chevy C10 "Under Construction" 2002 Chevy S10 V6

08-31-2007, 11:16 PM	#3
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: Installing mufflers, does it matter which way? the pipe diamiter should be just a little bigger on the front. front id should be the same as rear od. __________________ common sense isn't so common anymore

08-31-2007, 11:27 PM	#4
northerngmc Registered User Join Date: Jan 2004 Location: Whitehorse YK Canada Posts: 2,651	Re: Installing mufflers, does it matter which way? Pipe is the same front and rear, I measured with my calipers, 2 1/4 inch inside diameter. They are Walker universal fit mufflers. __________________ Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is!

09-01-2007, 01:13 AM	#5
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: Installing mufflers, does it matter which way? Universal mufflers are usually reversable. Are they round or oval?

09-01-2007, 11:32 AM	#6
northerngmc Registered User Join Date: Jan 2004 Location: Whitehorse YK Canada Posts: 2,651	Re: Installing mufflers, does it matter which way? Oval __________________ Blaine 59 GMC 9314 a.k.a. Whoopee 68 C20 50th Anniversary a.k.a. The Rat http://www.flickr.com/photos/northerngmc/ http://www.members.tripod.com/P-wee/index_032.htm 1.61803 is one H of a lot better than 3.14159, no really it is!



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