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Exhaust system?

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Old 03-10-10, 05:16 PM
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Exhaust system?

Hi everyone,

I know I'm a noob, but I don't understand all of this exhaust system modification terminology. I know what a catalytic converter is and I know what muffler is, but there are many things that don't have any meaning to me. could someone please explain?

Some things I would like to know about (how they differ from stock, how they benefit performance, etc.):
hi flow cats
headers
downpipe

cat back=everything after catalytic converter, right?

Basically, if I want the most hp increase for the least amount of money what should I do? If there is anything that I should know about that is not on the list, please tell me.
Thanks a bunch
Old 03-10-10, 05:50 PM
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Year/model? In FC terms...

High flow cat: A less restrictive catalytic converter.
Header: Replaces the stock exhaust manifold on an NA engine.
Downpipe: Replaces the precats on an NA engine & connects the stock exhaust manifold to the main cat.

OR

Replaces the precat on a turbo engine & connects the turbo to the main cat.

And yes, a catback is everything to the rear of the main cat.
Old 03-10-10, 07:31 PM
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Thanks, we're lookin' at an 89 fc n/a model.
Precat? is that the exhaust manifold or what ( I'm just thinkin' pre=before, and the exhaust manifold is before the catalytic converter)

sorry for all of the rookie questions.
.
Old 03-10-10, 08:17 PM
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Precats are small catalytic converters that are closer to the engine than the main cat. Because they're closer they warm up faster, and reduce emissions on cold starts. NAs have 2 small precats between the exhaust manifold and the main cat. Turbos just have one.

If you're looking to get the most out of the exhaust system, a header + a presilencer/resonator or high flow cat + a good catback system is the way to go. Check out the Racingbeat and Corksport websites.
Old 03-11-10, 10:25 AM
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You dont have to appologise for being a noob. We were all noobs at one point. This section is for those types of questions so ask away. Also if you want faster answers you can always use the search option. I find that if I go to advanced search and click on titles only that I get a lot of really good info quickly. Hope this helps. Welcome to the 7.
Old 03-11-10, 12:28 PM
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thank you for posting these exhaust questions!!!
I was wondering about the same thing. I love rookie questions, they help and inform me a lot.
Thanks for the good answers from the pros as well.

Tangoshark
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