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Old 19 Jul 2010, 05:16 am
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Default How the Exhausts System and Header improve performance in Civic 05?

How the Exhausts System and Header improve performance in Civic 05?
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Old 19 Jul 2010, 05:31 am
dan dan is offline
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They help the car breathe. Imagine running a marathon or doing the 100 meter dash only being able to breathe through a straw. Your body would severely held back because of lack of oxygen. The new exhaust components basically remove the restrictions. This can add horsepower but on a civic it might only add 5 horsepower. Nothing really noticeable.
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Old 19 Jul 2010, 05:46 am
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The person above me is correct. Only imagine if you put a test pipe on the exhaust. Now you have a free flowing exhaust with not back pressure. A test pipe eliminates the catalytic converter. So now your not breathing through a straw and you took off your face mask. Now your breathing 100% air with no restriction. Headers, test pipe, and a 3 inch exhaust pipe connected to a performance muffler could free up as much as 10-12 hp. I have a 02 Civic Si (K20A3) and when I changed my exhaust to what I just stated, i got a 14hp gain. ....i also have a 2.5 inch cold intake system.
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Old 19 Jul 2010, 06:01 am
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Eh, you guys got it backwards. Lol. Breathing through a straw is like having a stock intake. Putting a cold air intake allows the car to breathe better.

Now, having the stock exhaust system is like being constipated. Its hard for the car to push stuff out.

Headers/Cat-delete/performance muffler all allow the car to release exhaust better.

You don't want to go too big on piping though. Too much air flow can actually decrease your hp, and make the car annoyingly loud and obnoxious.
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Old 19 Jul 2010, 06:16 am
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not a whole lot. everything connects though pretty much, so header/exhaust and a cold air plus some engine work done can help, but header and exhaust alone wont make much of a difference
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