We only use performance aftermarket parts on all of our in-shop engine overhauls. We have done extensive research and testing in the shop to confirm the safety of every part we use. Keep in mind, not all aftermarket parts are safe to use. Some are built at much lower quality standards than others. In previous years, Original Equipment Manufacturer (OEM) parts were the only way to go and there were not as many aftermarket options.
Now with current technology, the aftermarket world has surpassed the OEM manufacturers. A lot of OEM parts are made overseas and a lot of the OEM overhaul kits are made with remanufactured (used) parts, which have a much higher risk of early failure compared to the aftermarket.