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An exhaust header is an after market automotive part designed to improve vehicle performance. The small gain in performance facilitated by an exhaust header is important to high performance drivers who often make other modifications to their vehicles in order to increase speed. These modifications include the installation of larger intake vents for the engine. An exhaust header modifies the exhaust system to prevent back pressure, meaning that the cylinders do not have to work as hard to push exhaust out as they do in a traditional system. There are different types of exhaust headers depending on the needs of the drivers, with some tuned for low performance and others aimed at high performance on the open road.

In a conventional exhaust system, after the cylinders combust, they push the exhaust out into the exhaust manifold, which routes the exhaust out of the vehicle through the exhaust pipe. However, the exhaust manifold can create a back pressure which pushes against the cylinder, meaning that it has to exert more energy to push the exhaust out and prepare for the next firing. As a result, some efficiency can be lost.

An exhaust header works differently, essentially creating a miniature exhaust pipe for each cylinder and routing the exhaust to a centralized collector which is much larger. The pipes of an exhaust header are bent to fit under the hood and cut to the same length so that the exhaust gases will arrive sequentially in the collector as each cylinder fires. This eliminates the back pressure problem and allows the cylinders to operate more effectively.

Aftermarket headers can be bolted in place of the stock cast-iron headers. Small block headers usually use 1-5/8-inch primary tubes and big-block headers use 1-3/4-inch tubes. An important consideration when choosing headers is quality of materials. Header tubing vary in thickness, but a good quality header should use between 18-gauge and 14-gauge tubing. The metal used in the header is also important. Some headers are mild-steel, which will rust and corrode over time. Headers can be coated, either with a ceramic coating or a high-temperature paint. Using 100% stainless steel construction eliminates the need for coatings, but it is usually out many buyer's budgets. When headers are shipped, they sometimes come painted. Be aware that this coating is only for rust prevention during shipping, and the paint will not hold up to the heat once the header is installed. When headers are added along with a cat-back exhaust and high-flow catalytic converter, you can usually gain 20-30 horsepower over stock.

In some cases, an exhaust header can be tuned to pull at the exhaust valve of the next cylinder and suck the exhaust out, meaning even less work for the cylinder. Drivers who desire more power for around town driving and better acceleration under a heavy load usually opt for a low performance exhaust header, while drivers who are looking for speed on the open road prefer high performance headers.

A variety of manufacturers make exhaust headers for a dizzying assortment of vehicles, and it is important to install the exhaust header designed for your car. Because exhaust leaks can be dangerous, the exhaust header should be installed with care, or professionally if there is any uncertainty. An improperly installed header could lead to an exhaust leak which vents into the cabin of the vehicle, causing symptoms of carbon monoxide poisoning in the driver and passengers.

I currently have my Pacesetter headers paired with a Basani Y Pipe for a combined gain of 23 hp! –Mike Rosania

Small Business Copyright Issues

Short Copyright Facts
The owner of a copyright has the exclusive right:

to copy the work
to modify the work
to distribute the work
to perform the work publicly
to display the work publicly

Copyright is important when you obtain content for your site, and in the protection of your content. Copyrightable works are usually on the form of text, image, music, etc. Facts, titles, recipes, form designs, alphabetical lists and other items do not have the required "originality" to merit copyright protection.

One of the misconceptions about copyright protection is that you have to register your work to gain legal protection. If you do protect your original works, you are more likely to win attorneys' fees and, sometimes, higher damages.

The term "Public Domain" does not mean that everything in public or on the Internet is free from copyright protection. It refers to items that either do not qualify for copyright protection, or for which the protection has expired. The default you should assume for other people's works is that they are copyrighted and may not be copied unless you know otherwise.

The correct form for a notice on your web site is:
"Copyright [dates] by [author/owner]"

You can use C in a circle © instead of "Copyright" but "(C)" has never been given legal force. The phrase "All Rights Reserved" used to be required in some nations but is now not legally needed most places.

Even if you don't charge anyone for a product that contains copyrighted materials, you are still violating the law. An example of such an unlawful act would be when Napster enabled widescale download of copyrighted music.

One exception would be fair use. Copyright law does not block your freedom to express your own works. For example, you may be reviewing an article from a news paper's web site that requires you to reproduce some of the work on your site is not the same as simply copying the work to your site so you don't have to create your own work. Of course, that does not mean that you can start posting articles from other web sites and pretend you are reviewing them, but you are simply stealing content to cut corners.

One of the key to the fair use doctrine is that you can not diminish the value of the original work. Copying just 300 words from Gerald Ford's 200,000 word memoir for a magazine article was ruled as not fair use, in spite of it being very newsworthy, because it was the most important 300 words - why he pardoned Nixon.

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what will it take to make my ford small block 289 run on E85 ethanol, or pure ethanol?

It's not the engine as much as the fuel system. The alcohol in the fuel eats up fuel pump diaphragms and seals in the carb . Get fuel parts that are made for alcohol and you should have no problems.

Ford Motor, Chrysler recall vehicles
WASHINGTON (Reuters) - Ford Motor Co is recalling 33,700 of its Transit Connect small commercial vans over an interior liner while Chrysler Group said it was recalling certain 2010 SUVs and trucks over a possible brake fluid leak.

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