Why a Aftermarket Rear Bumper Diffuser


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Aftermarket Rear Bumper Diffuser?

People purchase after market auto parts for a variety of reasons. Sometimes because a part breaks or wears out and an after market part is less expensive than buying from a dealer. Some people purchase parts because they enhance the look of their car. Others because the part or system improves something about the car, perhaps gas mileage, safety, handling, performance or other areas of the car.

A rear bumper diffuser is one of those products that may be purchased for both looks and performance at the same time. If you have seen a car with a strange looking rear bumper it may have a built in diffuser.

As a car moves through the air, there is an air flow over the car as well as underneath. The air flow under the vehicle may be faster, which will produce something called down force. This down force will tend hold the car to the road and improve hi-speed stability and cornering. It is always used on race cars and now more and more street cars are experiencing the same phenomenon. One method of increasing down force is a rear bumper diffuser. Here is how a bumper diffuser works.

A problem occurs when the air from the under body which is a high-velocity air stream meets the much slower free stream airflow of the ambient atmosphere. This causes turbulence which can be dangerous. The rear bumper diffuser provides a space for so that the boundary between the car's airflow and the external airflow is less turbulent.

On a typical street car the rear bumper diffuser does very little until high speed are obtained. Many high end cars such as Ferrari, BMW, Corvette, are now coming with a stock rear bumper diffuser or extensions below the bumper which accomplish the same thing. They look good and enhance the handling of the car.

Most after market rear bumper diffuser are either a replacement bumper with a built in diffuser section or a part that must be attached to the car. Usually you must cut holes in your bumper before the diffuser part will fit. If high speed stablility is worth a little installation time, then a rear bumper diffuser may be the answer. Before you buy a bumper diffuser, check out the installation instructions and the pictures of different looking applications using the bumper diffuser. You may want a bumper diffuser just for performance or perhaps becuase it also looks good.

Yahoo News

7/29/2010 -	Toyota recalls 412,000 cars in US, 16,000 in Japan (AP) AP - Toyota is recalling 412,000 passenger cars, mostly the Avalon model, in the U.S., and another 16,420 vehicles in Japan for steering problems, the automaker said Thursday.
7/29/2010 -	Volkswagen's Q2 profit up strongly at $1.6B (AP) AP - Sales at Volkswagen AG motored ahead in the second quarter, thanks in part to strong demand from China and helping to push earnings sharply higher to euro1.25 billion ($1.6 billion), the company said Thursday.
7/29/2010 -	China govt approves Geely acquisition of Volvo (AP) AP - Geely Holding Group has received final Chinese government approval to acquire Volvo Cars from Ford Motor Co., the Commerce Ministry said Thursday.
7/29/2010 -	Nissan posts $1.22 bln first quarter profit (AFP) AFP - Japan's number three automaker Nissan Motor on Thursday announced a soaring quarterly net profit on sales of cars in Asia, stronger auto demand in the United States and cost cuts.
7/29/2010 -	Nissan returns to profit, Mitsubishi reduces loss (AP) AP - Nissan Motor Co. veered back into the black in its latest quarter as global car sales rebounded while its smaller rival Mitsubishi Motors Corp. narrowed its quarterly loss.
7/29/2010 -	Toyota says to recall 412,000 cars in the U.S. (Reuters) Reuters - Japan's Toyota Motor Corp said on Thursday it would recall 412,000 high-end passenger cars in the United States to fix steering problems.
7/29/2010 -	Nissan returns to profit on sales growth (AP) AP - Nissan Motor Co. veered back into the black in its latest quarter as global auto sales rebounded, putting the company on track to meet its yearly profit target.
7/29/2010 -	Nissan and Hyundai profits soar as U.S. and China seen slowing (Reuters) Reuters - Nissan Motor Co (7201.T) and Hyundai Motor Co's (005380.KS) forecast-beating quarterly profits may prove tough to match in the second half as robust sales in China and elsewhere start to slow.