1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

exhaust

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Old May 10, 2007 | 10:48 AM
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From: ottawa ks
exhaust

what would be the best exhaust system for my 12a? how good would headers and straight pipe be
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Old May 10, 2007 | 11:06 AM
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Straight pipe would be bad.
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Old May 10, 2007 | 11:09 AM
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oh well some i know said it gets pretty good performance i know this probbalbly bad what about a cheap glass pack? Or what about a 3 gen or secon gen exhaust? Im just trying to get options
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Old May 10, 2007 | 11:18 AM
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Headers and a straight pipe would be not practical for the street. I don't know if you have ever heard an NA rotary with a header and open pipes but they are VERY loud. They make the 4 bangers with the same setup sound quiet.

I would recommend a RB header and presilenser into a Magnaflow muffler.

They are quality and have stainless packing. They also sound very well.
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Old May 10, 2007 | 11:34 AM
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Header backs are super loud.

Glasspacks will melt within a few months if you are lucky.

Main Headers are Racingbeat, or Mazdatrix.

Main Exhaust choices are Racingbeat, Borla, and Magnaflow.

Stay away from anything Pacesetter.
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Old May 10, 2007 | 02:19 PM
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From: ottawa ks
k thanks
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Old May 10, 2007 | 02:28 PM
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I would recommend silencing that exhaust somehow. If you use a straight pipe your ears will bleed. I fired up my 85 GS with open headers one time and I thought my garage was going to fall in on itself. Loud is not the word to describe it. Even with your fingers in your ears it still hurts.... Unbeliveable....
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Old May 10, 2007 | 02:32 PM
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lol what about the stock silencers i got 4
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Old May 10, 2007 | 02:35 PM
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I don't remember any stock silencers... Are you talking about the catalytic converters? Most FB's have this setup: Manifold > cat > cat > cat > centerpipe > muffler. You should be able to get a NICE presilencer from Racing Beat. They quiet the rotary down a lot, and last for ever. On the downside they are a little heavy...
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Old May 10, 2007 | 02:39 PM
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i thought the little ones where pre silenceres boy i feel dumb
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Old May 10, 2007 | 02:45 PM
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The rotary burns pretty dirty, which has always been one of its downfalls. It takes a lot of catalytic converters to clean up the ol' 12A apparently. As a matter of fact it takes 3! While they do help quiet down the exhaust quite a bit, their main function is to preserve the air that you and I enjoy breathing so much.
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Old May 10, 2007 | 02:52 PM
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well if thats the case my cats dont work worth a crap
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Old May 10, 2007 | 02:55 PM
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Lose the cats. Go with a RB header and presilencer. If you can afford it, get the complete RB system. If not, substitute a Borla muffler.
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Old May 12, 2007 | 07:43 PM
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i got a ricey greddy muffler (it probablly wont work or look good) but what will it be like on the rx you think it would melt or blow out? ill probably just put it on my bu
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