What do exhaust headers do?
110973
Headers decrease back-pressure which increases horsepower.  Dual exhause allows for free flowing exhause - to increase horsepower.  One thing with more modern cars, you would need to add a second o2 sensor (some v6 or v8 cars have a single o2 sensor at the end of the crossover pipe).  Dual tail pipes is way more common than genuine dual exhause - you do need two of everything (o2 sensors, cats, ect).
444563
There are tons. Water filtration plants use catalysts, the exhaust on your car uses a catalyst. They are used extensivly due to their ability to readily interact and combine with complex organics.
381876
they really need to keep kids from answering questions, since the previous dipsh!t has no idea what he is talking about.\n\nan intake manifolds rpm range refers to what rpms that particular manifold is best suited to make power at. i.e. a dual plane intake is generally good from idle til 5500-7000 rpm, a tunnel ram is in the 3500-8000+ rpm range.\n\nbut to answer your question, you either have an older manifold or you have your second number incorrect, is it possibly a 36 instead of a 35?
97818
You have to drill a hole at an angle toward the end of the piping of the muffler.  And the other way is to crunch the tip of the piping to about an 1 1/2 to 2 inch opening and put a chrome tip on.  This will decrease the power of the vehicle.
854960
Your question is too broad/vague and I don't know which technologies you're talking about but if this is web-related, it sounds like you need to enable Buffering so that if you try to set a header that is superceded by another header that was already scheduled for output, the application is able to rewrite the existing headers in the buffer.  Once they're sent out, they can't be taken back so you can't write conflicting header information.
575266
The catalytic converter in your car already does that. It uses some special transition metal catalysts to break NOx compounds into N2 and O2. (remember that once you boil HNO3, it's largely H2O and N2O5)\n\nIf you have HNO3 fumes in the lab, you can bubble the exhaust through a NaOH solution. The HNO3 will react with the NaOH to give NaNO3, which isn't volatile. While this really isn't practical on the commercial scale, it can be very handy in the lab when you are running a reaction that produces a volatile acide like HNO3.
551860
Not sure what you are asking....but exhuast header will vary depending on the engine and type of header.  Typically you may gain up to 8-10 % performance.
160454
Same theory as a car muffler.  Provide an enclosed space for the gasses to expand with baffles to slow them down.
263519
All running engines, whether idling or engaged, whether buses cars or trucks, produce those exhaust fumes because they are products of combustion...\n\nAnd this is one source of air pollution.
205968
It's a computer module that monitors and regulates a lot of things in an engine. With input such as revolutions (rpm), oil and water temperature, air density and oxygen levels in the exhaust it determines and regulates things like the firing moment of the spark plug and the amount of fuel to be injected ito the cylinder.\nPlease read the link: http://en.wikipedia.org/wiki/Engine_Control_Unit
1142298
ob_start();\n\nheader('some_header');\n\nob_end_flush();\n\nIf you place ob_start() at the beginning of your script nothing will be sent until you call ob_end_flush(). This way you can add your header() functions as you need them.
1078650
The pulsating flow from each cylinder's exhaust process of an automobile petrol or diesel engine sets up pressure waves in the exhaust system-the exhaust port and the manifold having average pressure levels higher than the atmospheric. This varies with the engine speed and load. \nAt higher speeds and loads the exhaust manifold is at pressures substantially above atmospheric pressure. These pressure waves propagate at speed of the sound relative to the moving exhaust gas, which escapes with a high velocity producing an objectionable exhaust boom or noise. \nA suitably designed exhaust silencer or muffler accomplishes the muffling of this exhaust noise. The basics of silencing can be understood by recalling a few principles of physics. The velocity of sound in the gas at a given temperature is directly proportional to the square root of the product of the pressure and the ratio of the specific heats (at constant pressure to that at constant volume), and inversely to the square root of the density of the gas. \nAs the temperature varies, the velocity also varies directly as the temperature by another square root law involving the product of the coefficient of thermal expansion of the gas and the temperature. The exhaust noise can be reduced appreciably by providing resonance chambers to offset the noise wave effects. Since it silences the noise to be produced by the exhaust air . it is called silencer.
223043
The gasket may be blown.  Are you getting excess exhaust/fumes?
72462
intake , exhaust plugs n cables
170961
here's comaboy calling names again. the stuck egr is a vacuum leak, it's not the exhaust making it die. do me a favor and punch yourself in the face. insulting people over the wire is about as manly as boy george
398883
Turbo is a good way to increase your car's power. Also, a bigger intercooler as well as new piping kit will help moter breath better. A new air filter will give you some extra power. A good exhaust and a new ECU program will help you a lot. After these your power must be 500+ PS, believe it or not. I have seen M3 over 1000 PS.
730432
The fan works to cool your comp. down when it gets a but hot.\nIt will turn off and on to maintain the temp at a reasonable level. \nJust like a thematic fan on a car does to keep the radiator cool.\nWhne you use more power from the comp it gets warmer quicker, There is nothing to worry about.