During the past years, the popularity of aftermarket performance auto parts has grown at a tremendous rate.

Basically considered as an alternative to automotive parts which are not produced by auto manufacturers these aftermarket parts compete with original equipment manufacturer parts. You can also buy 12 valve Cummins performance parts by clicking right here.

They are usually purchased and added to the car or truck by the car owner or a performance shop. Most of this work is done after the car has been sold at a dealership.

In terms of design and function, aftermarket auto parts are very similar to the stock automotive parts and primarily used to substitute a stock part with one that produces more horsepower and torque.

Nowadays many car owners are choosing aftermarket products because they are comparatively less expensive than replacements. Although at times some aftermarket auto parts fail to meet the high standards of original equipment. It is also wrong to say that aftermarket products are usually second-rate in terms of style.

There are numerous sources for aftermarket auto parts. Online stores have taken the internet by storm with hundreds launching every month. The response has been very positive which has made more and more sites pop up.

Not long ago people were skeptical about purchasing online. It was new and with many things new, it takes time to catch on. Once people saw that it was safe and much more efficient the boom was on.