We use parts from original equipment manufacturers (OEM), aftermarket and used. We search out and use only the best parts for the job.
Poor quality parts may be less expensive but tend to perform in a substandard manner, do not last, fail and cause other problems, do not fit properly. Low quality parts are not worth the cheap price and we will not use them. Poor quality is remembered long after the cheap price is forgotten.
Some examples of good quality parts include Bilstein, Interstate Battery, Castrol Oil Products, Nokian and Hakkapeliitta tires, Bosch and far too many others to mention in this limited space.