What is the difference?
Race Director
Joined: Oct 2000
Posts: 12,668
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From: Shamong, NJ
The 57-62 Off Road exhaust system utilized round, straight through mufflers, similar to glass packs. They were louder, and produced less back pressure, for more sound and improved performance.Mufflers used with the 63-67 and 68 N11 (Off Road) system, are oval like standard mufflers, but still produce a louder sound and less back pressure.
For 69, N11 was replaced with N14, the side exhaust system. Because of increasing pressure from Federal, State and Local governments, 69 was the last year that any form of louder and freer breathing, optional exhaust was offered.
Drifting
Joined: Mar 2002
Posts: 1,478
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From: Bakersfield CA
My '56 has the smaller, round "off road" exhaust mufflers, it sounds awesome I don't think it was an option but I'm sure glad whoever added it did!
I don't think it was an option but I'm sure glad whoever added it did!
Last edited by 92GTA; Apr 15, 2011 at 10:40 AM.
Thread Starter
Le Mans Master
Joined: Mar 2005
Posts: 6,987
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From: Greenwood In.
I thank you all for that bit of information. I am sure there were others out there that did not know the difference but thought they would look like a fool for asking. Hell I don't care if I look like a fool. Anyway Thanks
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It turned into a beauty. Here are some "after" pics
http://forums.corvetteforum.com/c1-a...n-the-sun.html
http://forums.corvetteforum.com/c1-a...n-the-sun.html
Last edited by 62Jeff; Apr 15, 2011 at 08:32 PM.
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It turned into a beauty. Here are some "after" pics
http://forums.corvetteforum.com/c1-a...n-the-sun.html
http://forums.corvetteforum.com/c1-a...n-the-sun.html
Le Mans Master
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2024 C2 of the Year Finalist - Unmodified
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Melting Slicks
Joined: Sep 2006
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From: Monroe Twp, NJ
The 57-62 Off Road exhaust system utilized round, straight through mufflers, similar to glass packs. They were louder, and produced less back pressure, for more sound and improved performance.Mufflers used with the 63-67 and 68 N11 (Off Road) system, are oval like standard mufflers, but still produce a louder sound and less back pressure.
For 69, N11 was replaced with N14, the side exhaust system. Because of increasing pressure from Federal, State and Local governments, 69 was the last year that any form of louder and freer breathing, optional exhaust was offered.
Melting Slicks
Joined: Sep 2006
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From: Monroe Twp, NJ
Race Director
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JohnZ would probably know the story, but from what I heard the term "off road" was supposed to be for racing apps, but also a politically correct labeling of the option of "louder, free-er flowing hotrod exhausts", because mufflers aren't used when racing.
Team Owner
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From: Washington Michigan
Melting Slicks
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From: Monroe Twp, NJ
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From: Utica KY
An old experienced electrician told me one time "There is no such thing as a dumb question if you don't know the answer"
