Is this a test pipe?
Thread Starter
Melting Slicks
Joined: Sep 2004
Posts: 3,223
Likes: 666
From: Northeast
Is this a test pipe?
Put a new exhaust system on my 78 L82 and removed this portion. I went on line and couldn't find any c3 test pipes, and then looked for the length of a CC (PO removed) but came up empty. If it is, are guys still looking for these or is it just trash?
Team Owner
Joined: Jun 2000
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From: Southbound
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Race Director
Joined: Nov 2002
Posts: 12,142
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From: Taylor Michigan
That's a muffler shop test pipe...GM used a slip fit converter and 3 bolt end flanges were never used by the commercial test pipe companies. Easy to make with tubing and a pipe bender.....
Safety Car
Joined: Jun 2004
Posts: 4,364
Likes: 221
From: Beecher Illinois
Let me know how much you'd like for it and shipping.
When I returned my black79 to stock last year I put the original cat back on. Like to replace it with the test pipe. Save the cat for judging or when I (n)ever sell it.
Got a test pipe in place of the cat on my white79 and it sounds a whole lot better. Almost as good as the black one did when I had the headers and duals on it.
Original cat's very restrictive. I've run the Vettes with the rear Y pipe and mufflers removed, cat in place, and it was as quiet as could be.
Plus, they get so hot!
note....my existing test pipe has 2 bolt flanges. Kinda leaky. Had to put washers and bolts in the other 2 holes against the flange to help seal it up.
Last edited by KapsSA; Apr 25, 2011 at 08:28 PM.
Le Mans Master
Joined: Jan 2004
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St. Jude Donor '14
Melting Slicks
Joined: Nov 2005
Posts: 3,323
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From: Green Valley Arizona
I have one of those....except mine is not rusty at all....it has never seen a wet road. Also the converter I replaced the original one with has four bolt flanges on both ends...same as the test pipe. Had to make a new AIR line to the converter though as the inlet was on the other side from original. Both are sitting in a box as I put Hooker Sidepipes/Headers on.
Melting Slicks
Joined: Aug 2003
Posts: 3,415
Likes: 290
From: dayton oh
A quick Ebay search will yield 6+ sellers of test pipes for Corvettes - they get around legality the same way the Vette parts houses do "For off-road race use only"
