Correct 1967 Corvette exhaust

[C M.]

Re: Correct 1967 Corvette exhaust

I would think what most people are doing is just putting regular mufflers on instead bidding some crazy price on ebay.

OK, so if I understand correctly, no one is making the correct N11 mufflers at this time. At the meets that we have attended there are certain cars that sound like they have the N11 exhaust system and then there at others that are noticeably quieter. How does this happen? Is this just the difference b/w vendors and build quality?

Thanks again and sorry for all the questions. Im just trying to wrap my arms around all of this.

Thanks,
Chuck

[C M.]

Re: Correct 1967 Corvette exhaust

I just spoke with the folks at Gardner's. He is, in fact, looking for a "well worn" N11 muffler that he won't feel bad about cutting up to use as a model. I really hope he finds one as I offered to sacrifice a new one if all else fails.
I suggested that he also consider offering the welded version with mild steel pipe in place of aluminized pipe. He seems to be the type of guy who wants to get it correct! His business is about 3 hours away from me so I may make a visit to his shop at some point. I'll keep you all posted if there is any news.

Is there a way to visually inspect a muffler to tell if it is an N11 w/o cutting it open. I know that the mufflers on our car have part numbers on them. Is there a part number that associates with an N11 muffler?
Thanks,
Chuck

[Keith B.]

Re: Correct 1967 Corvette exhaust

I would also like to know why no one is puitting the GM part numbers on the mufflers

[Mike M.]

Re: Correct 1967 Corvette exhaust

I have Allens off road on my 65. I'm not sure how the originals sounded but I like mine. Until someone comes up with the correct muffler that is about the only option. I'm not worrying about it. When Gardner has a system and I need one i will buy from them. We are getting a little anal about this I think. Whats the big deal.

[Patrick H.]

Re: Correct 1967 Corvette exhaust

OK, so if I understand correctly, no one is making the correct N11 mufflers at this time.

They're coming.
They're coming.
They're coming.

I've said it before, and I'll say it again.

They're coming.

A company that is NOT Gardners is tooling them up.

Come to our Regional and you "may" get to see and hear them.

Patrick

[Rick S.]

Re: Correct 1967 Corvette exhaust

What I don't understand is how this thread changed from a '67 N11 Off Road Exhaust System question by the originator to a discussion of remaining side exhaust systems purchased by Allen's.

Kent,
That is my fault and I apologize. I guess there were too many "after dinner" drinks.
Rick

[Chuck M.]

Re: Correct 1967 Corvette exhaust

They're coming.
They're coming.
They're coming.

I've said it before, and I'll say it again.

They're coming.

A company that is NOT Gardners is tooling them up.

Come to our Regional and you "may" get to see and hear them.

Patrick

I am sorry if this is something that has been discussed ad nauseam. I am just trying to understand what is available these days. We have not been real active in the NCRS the past couple of years and are excited about getting back into the swing of things. Unfortunately we have not frequented this discussion board in a while so I am sorry if this seems repetitive.

Thank you all for the input it is greatly appreciated!

Chuck

[Kent K.]

Re: Correct 1967 Corvette exhaust

And Rick, if you noticed, I contributed to the side exhaust discussion instead of the great sound of N11 Off Road Exhaust system. The guy who helped me tremendously with my '67, had a '65 with an off road system that he ordered from some vendor. I'll have to ask him if he remembers who it was. Of course, that repro system of that long ago has probably transitioned to something different.

[Jim W.]

Re: Correct 1967 Corvette exhaust

Kent, You may remember Zierden Exhausts who was a vendor at the Florida meet for years and who I believe advertised in The Driveline, Vette Vues, etc. They made a one-piece off road system that looked and sounded right. Zeirden was later sold and I got a set from their successor in the late 90's . If I think of the name or find a receipt, I'll post it. Jim

[Terry M.]

Re: Correct 1967 Corvette exhaust

Kent -- the weld you are describing is a hand weld, most likely a shielded arc. Welds used on the exhaust system -- all styles -- are likely machine made on automated equipment, most likely metal inert gas (MIG) and will look different than your description. An image of an original weld would best serve so that a skilled welder could chose the correct system for the task.

[Kent K.]

Re: Correct 1967 Corvette exhaust

Kent, You may remember Zierden Exhausts who was a vendor at the Florida meet for years and who I believe advertised in The Driveline, Vette Vues, etc. They made a one-piece off road system that looked and sounded right. Zeirden was later sold and I got a set from their successor in the late 90's . If I think of the name or find a receipt, I'll post it. Jim

Jim - I remember Zeirden. Too bad they're gone since they had great systems. I'll still have to ask Vern if that's the vendor of his system.

[quote=Terry McManmon] "...the weld you are describing is a hand weld, most likely a shielded arc. Welds used on the exhaust system -- all styles -- are likely machine made on automated equipment, most likely metal inert gas (MIG) and will look different than your description. An image of an original weld would best serve so that a skilled welder could chose the correct system for the task."

Terry - my welding classes were a loooooong time ago, probably before MIG and TIG welding were invented. So, guess you're right about them looking different. BTW - none of the welds on my '67 frame looked like they were done using lessons I learned. Were they also done with a different method?

Sorry folks, this should have been a new thread discussing welds.

[Patrick H.]

Re: Correct 1967 Corvette exhaust

I am sorry if this is something that has been discussed ad nauseam. I am just trying to understand what is available these days. We have not been real active in the NCRS the past couple of years and are excited about getting back into the swing of things. Unfortunately we have not frequented this discussion board in a while so I am sorry if this seems repetitive.

Thank you all for the input it is greatly appreciated!

Chuck

Chuck,

Not a problem. If you miss a thread, then it's easy to miss a comment about anything. I'm just trying to spread the word (some more) that the N11 exhaust is on its way.

Patrick

[Dick W.]

Re: Correct 1967 Corvette exhaust

I would also like to know why no one is puitting the GM part numbers on the mufflers

The only way that you can use the GM numbers on anything is to purchase a license to do so. Not inexpensive. Same way with the "W" or "A" that the original mufflers had.

[C M.]

Re: Correct 1967 Corvette exhaust

The only way that you can use the GM numbers on anything is to purchase a license to do so. Not inexpensive. Same way with the "W" or "A" that the original mufflers had.

I went outside to take a look at the numbers on the driver side muffler and here is what I found:

GM
3845727
A
212704

Can anyone decode these numbers?

Thanks,
Chuck

[John H.]

Re: Correct 1967 Corvette exhaust

Zeirden was later sold and I got a set from their successor in the late 90's . If I think of the name or find a receipt, I'll post it. Jim

I had a Zierden system on my '57 - as I recall, their assets were purchased by an outfit named "****Co".