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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 06-21-2005, 08:39 PM   #1 (permalink)
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I have a 98 328is and am in the process upgrading.

Headers- I want to put headers on it and want to know if anyone has them, and if they make too much noise. I dont want a loud car, like a trash honda.

Exhaust- will it only give me like 5 extra horses

Pulleys- how much will they free up

Thanks
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Old 06-22-2005, 02:21 PM   #2 (permalink)
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I have heard that headers will give you a little more top end performance and you will be able to feel it on the freeways. I don't know if they make your ride louder or not. But they will help the engine breath a little better.

Also an exhaust is not for performance ever... new mufflers are for being loud! REALLY loud! But I only say that because I have exhaust system envy!
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Old 06-22-2005, 02:48 PM   #3 (permalink)
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speaking of headers, does anyone have a stock photo of '95 318i manifolds?...

And EXHAUST isn't jus for noise, it does free up breathing depending on your configuration, whether or not it is noticeable in the dyno it tickles your horespower some more than others.

Simply by removing your cat you free up some potential horespower.

Same thing with older turbo diesels and their egr's.
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Old 06-22-2005, 02:57 PM   #4 (permalink)
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Removing the cat is illegal in most states. You will not pass smog inspection and might get fined.

I'd like to know know if there is an exhaust that isn't much louder than stock that makes a significant improvement. I would much rather have a sleeper than something you know is hot or just plain noisy.

The headers on BMW are decent. They are not like the exhaust manifolds seen on many cars. That is to say, bimmers already have headers.
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Old 06-22-2005, 03:29 PM   #5 (permalink)
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The only headers that give you a gain require a whole new exhaust system to fit. They're made by a company called supersprint. The system is expensive, and imho totally not worth the meager gain. Pulleys don't do shit either. What you honestly want are S52 camshafts and some special software. That's more worth the money.
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Old 06-22-2005, 03:39 PM   #6 (permalink)
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pulley's will free up a little, but they will not make a huge difference on an otherwise stock car. They'll free up a few, but not give you a performance edge over any car that you are not otherwise currently outperforming. As for exhaust, no real gains on an otherwise stock or lightly modded car. Same for a CAI. However, if you were to follow the adive above and get the cams and software (make sure you get the software for an engine with the cam swap), then you are looking at some good HP gains. Then if you do the headers w/exhaust as mentioned above ect then you will be look at noticeable gains from the otheers. Not as much as the software or cams, but you might actually get the HP increase that is claimed.
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