Car areas Online Shopping appeal to numerous features. Used areas are usually OEM parts, which cost about one-third of what the new ones do in most of the cases. If you take the old standard calculation of car repair costs into consideration (50% areas + 50% labor) the overall savings could be as high as 35%.
The creators of the site were upset that their biggest customers didn't produce easy access to their areas inventory. Tuning an exhaust for performance is a complicated practice, which is why it is best left to the professionals.