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Test Pipe?

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Old Jul 31, 2010 | 10:15 AM
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Default Test Pipe?

What should i tell the muffler shop are the dimensions for a test pipe for my '80? Or can i just find one online somewhere?
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Old Jul 31, 2010 | 12:30 PM
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Good question.....I am wondering the same thing. I want to get rid of catalytic converter..
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Old Jul 31, 2010 | 12:54 PM
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Cool! I just need it so I can go to a shop w/o a cat and get my dual system installed.

I guess I can take the car in and have them put it on a lift and all that. I just think
It will be easier to tell them the pipe size.

Anyone know?
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Old Jul 31, 2010 | 12:56 PM
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take what you have ,knock out the insides with a long pipe .you now have a test pipe that looks factory but performs like a test pipe.
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Old Jul 31, 2010 | 01:01 PM
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Thanks Terry, but I need to remove the cat so a shop can install a catless system. Plus I want to keep the cat when test time comes.
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Old Jul 31, 2010 | 01:18 PM
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You can get sections of exhaust pipe at most local parts stores.
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Old Jul 31, 2010 | 01:50 PM
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i would still gut the old cat put it back on ,cost zero.then i would buy a new one for when you test .the old ones did a terrilble job .the new ones do a good job and do not restrict the flow.
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Old Jul 31, 2010 | 03:58 PM
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Ok, but I still need to remove the cat! A muffler shop will not install my dual system if the car has a cat.

I want to know what to tell the guy at the shop. "Hey can I have a test pipe that's so and so in size...."

Last edited by FedorC3; Jul 31, 2010 at 04:01 PM.
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Old Jul 31, 2010 | 04:21 PM
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you can buy a duel exhaust from the corvette catalogs and put it on your self.but if you have to have a cat for emissions testing you or the muffler guy can put on a new cat that will help your performance.
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Old Aug 3, 2010 | 08:40 AM
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I purchased a "Test Pipe" for my 1977 on eBay...

The seller sells them for all years, makes & models

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT
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Old Aug 3, 2010 | 10:14 AM
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lets start again .you want a duel exhaust that has a removeble cat?if you want duel exhaust you will have duel cats .do you have a stock motor?if you dont have a lot of hp the duel exhaust wont help you that much .the best thing to do is have the old bad cat upgraded to the new stuff because you are still being tested .now if the old cat has been cut off.....and you want a shop to work on it ...tell them it is a 1972.
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Old Aug 3, 2010 | 11:16 AM
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Default Simple to Make

The easiest way to have a 'test' pipe made is to cut it off with a saws-all or similar device without damaging either end and have them make a pipe matching the old converter with their pipe bender....We made many pipes this way and the customer went home and installed them... out of sight, out of mind....for those shops that cant remove them....
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Old Aug 3, 2010 | 06:44 PM
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Originally Posted by Ironcross
The easiest way to have a 'test' pipe made is to cut it off with a saws-all or similar device without damaging either end and have them make a pipe matching the old converter with their pipe bender....We made many pipes this way and the customer went home and installed them... out of sight, out of mind....for those shops that cant remove them....
measure overal length before you cut.
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Old Aug 3, 2010 | 08:33 PM
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...or you can buy a test pipe cheap on ebay that is already made....and send it back if it does not fit. To me...its not that expensive because my time is worth more than removing the converter ...measuring, cutting and fitting a test pipe and then having someone weld it for me. I'd rather pay $60 for the pipe and just install. By the way.....I'm not the seller or maker...or friends with the person making these. I know I'm new here so I dont want anyone to think I'm here to promote somebodys product. I just think this is cheap and easy if it fits...

Last edited by Jetglow; Aug 3, 2010 at 08:35 PM.
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Old Aug 3, 2010 | 08:45 PM
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From: columbia city in
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Originally Posted by terry82
take what you have ,knock out the insides with a long pipe .you now have a test pipe that looks factory but performs like a test pipe.
free
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