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Old 11-06-2009, 02:36 AM   #1 (permalink)
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Default Header/Exhaust system sound

I'm gonna buy this header
http://www.slickcar.com/productdetai...ProductID=7389
And I will also install the rest of the exhaust system, of course I can't afford a Flowmaster/Magnaflow cat back, so I'll put a custom system in a muffler shop (I live in Mexico), so my question is: What kind of system, diameter or whatever affects the sound should I install so my car won't sound a lot (like a ricer car)? I just want a nice sound, not so loud. I want a sound like this one:
http://www.youtube.com/watch?v=A6xhm...eature=related

THANKS.
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Old 11-06-2009, 07:44 AM   #2 (permalink)
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Default Re: Header/Exhaust system sound

If you are deleting the cat, I'd go straight to a 4-2-1 long tube. Check out the OBX one.

It's a bit more expensive, but worth it.

http://cgi.ebay.com/ebaymotors/OBX-4...Q5fAccessories

For an exhaust, the biggest thing is throwing a huge resonator in there. That will keep it quiet.
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Old 11-06-2009, 09:25 AM   #3 (permalink)
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Default Re: Header/Exhaust system sound

Go to 2.25"-2.5" exhaust tubing (57mm-63mm) and throw on a nice big resonator. You could also go the same route FocusSport went and throw on two resonators. The FS Stealth exhaust system uses two Magnaflow resonators.

That'll keep your header noise down.
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Old 11-06-2009, 10:00 AM   #4 (permalink)
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Default Re: Header/Exhaust system sound

Quote:
Originally Posted by hEaT View Post
If you are deleting the cat, I'd go straight to a 4-2-1 long tube. Check out the OBX one.

It's a bit more expensive, but worth it.

http://cgi.ebay.com/ebaymotors/OBX-4...Q5fAccessories

For an exhaust, the biggest thing is throwing a huge resonator in there. That will keep it quiet.
Agreed. That link you posted isn't a 4-2-1 header, although they claim it is. It's a shorty header with an off-road pipe, which gives you the gain of eliminating the cat and smoothing out the exhaust flow, but to get a scavenging effect, you need a REAL 4-2-1 like the one that hEaT posted. The one you posted is crap.

Go with the OBX. It's an extra 5hp or so (at least) over the header you linked to.
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Old 11-08-2009, 12:39 AM   #5 (permalink)
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Default Re: Header/Exhaust system sound

Thanks a bunch mates!
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Old 11-08-2009, 04:16 PM   #6 (permalink)
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Default Re: Header/Exhaust system sound

It depends on how you want to drive the car. The shorty you posted will help preserve low end torque better that the long tube, but the long tube that is mentioned above will free up more top end HP.

If you use the shorty, stick with 2.25 inch piping, and a long resonator into a straight-through (turbo style) muffler. Bigger tubes will give a more hollow sound and slow your exhaust gasses. But you'll need to wrap the header, because it's chromed not ceramic coated, so the underhood temps will be high without wrap.
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Old 11-09-2009, 01:38 PM   #7 (permalink)
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Default Re: Header/Exhaust system sound

if you are worried about sound AND flow, you will want a high flow cat and as many mufflers as you can fit....

http://www.focusfanatics.com/forum/s...d.php?t=187791
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