As a hesitant automotive enthusiast, I was skeptical about PURCHASING this product. However as a result of my tests, I determined that this bearing retainer significantly improved the performance of my car .The quality of the part is noticeable and I am confident in its durability. The only downside is that it is a bit pricey compared to other options on the market. Overall, i would highly recommend this retainer for those looking to enhance their cars performance..