What is better headers or exhaust manifold?

Why are headers are a better choice than an exhaust manifold? As stated above, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure.
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Do exhaust headers increase horsepower?

Remember, headers increase horsepower a lot more on a modified engine. If you have enough room to spare for a long tube header, do so. That'll produce quite a lot of extra horsepower over stock exhaust manifolds.
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Are exhaust manifold and headers the same thing?

A header does the same thing as an exhaust manifold—it also collects gasses from the engine and delivers them to the exhaust system. Headers are made of longer, thinner steel tubing. They are typically used on high-performance cars, and they're usually added aftermarket to maximize the engine's power.
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Do headers make your car sound better?

Car headers do not make your car louder as compared to the stock exhaust manifold. This aftermarket addition is used to improve the performance of your car and give you a cleaner-sounding exhaust. The actual volume of the exhaust won't change.
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Why are headers better?

The goal of headers is to make it easier for the engine to push exhaust gases out of the cylinders. When you look at the four-stroke cycle in How Car Engines Work, you can see that the engine produces all of its power during the power stroke.
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Headers vs Manifolds - Summit Racing 101



Do I need a tune for headers?

Long tube headers constitute as a major change for the exhaust aspiration of your vehicle's engine. To compensate for the added air flow, and the relocation of the oxygen sensors, a new or updated tune is required.
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Why do headers sound better than manifolds?

Since manifolds are thicker when it comes to absorbing pressure, they also absorb most of the sound from the exhaust. But if you like to step on the gas and hear your engine scream, then you're going to love what headers have to offer.
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Is a new exhaust system worth it?

By improving the airflow through the system and decreasing back pressure, aftermarket exhausts reduce the energy wasted in the system having to overcome these pressure problems. This leads to better fuel efficiency. Better sound: Aftermarket mufflers can significantly louden the sound of your engine.
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Are manifolds quieter than headers?

Though we don't hear people complain about the extra power headers produce, some guys would rather not put up with the usual header hassles. Tubular header pipes are never as quiet as a cast-iron stock exhaust manifold.
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How much HP does an exhaust add?

Everything that comes before the muffler, where the pressure is greatest and performance potential is highest, will remain tight and congested. MagnaFlow, an aftermarket exhaust manufacturer, says that its customers can expect horsepower gains of around 10 percent (which is a pretty commonly-quoted figure).
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Are headers legal?

Headers aren't illegal, however, long tube headers on the other hand are a bit of a different story. Not only will they make your vehicle louder, but it is also considered tampering with your vehicles emissions, which according to the EPA is illegal under federal law.
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What kind of exhaust gives the most hp?

The included SuperFlow mufflers have a straight-through design for a stronger sound and added power. Thanks to the high quality craftsmanship, Gibson exhaust systems are truly enduring and will serve you well for a long, long time. With this system, you will get the highest horsepower and torque at 1800-3000 rpm.
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What headers give the most horsepower?

Medium and long-tube headers allow an engine to make more horsepower at high rpm.
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How much hp does a intake manifold add?

Depending on your make, model, engine size, and type of intake, truck owners can expect an increase of between 5 and 15hp.
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What is louder 2.5 or 3 inch exhaust?

3" should be louder than 2.5" if all parts are the same. If the muffler is raspy, you'll hear more rasp at 3".
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Are headers hard to install?

Tubes connected to each cylinder work together in a coordinated effort to ensure your engine reaches peak peformance. It is a labor-intensive job installing one of these to your own car, but installing a performance header is far from impossible. Some mechanical background will be helpful, as will a deep socket wrench.
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Will long tube headers make car louder?

it will be quite a bit. The cast manifolds do a great job of absorbing noise, due to their mass. Louder yes but a good louder.
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Are bigger headers better?

Header Size: Bigger Isn't Always Better

Although smaller-diameter primaries will flow less volume than bigger primaries, a smaller diameter pipe actually creates faster exhaust flow velocity with just enough resistance to foster good low- and midrange torque.
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Will shorty headers make exhaust louder?

Yes they will make it a little louder, but not a significant amount. The tone will change and it will sound much more "tinny". If you leave your stock mufflers you will not have a problem, but if you do a cat-back it may get too loud for you.
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