Hi Belen, I'm glad to assist you. This set of aftermarket main bearings conform to the factory original main bearing specifications of your vehicle (or the vehicle application and engine size you have selected online). Please provide your complete vehicle information (year, make, model, submodel, and engine size) so we could accurately identify the correct and matching part for your vehicle. Take note that this part is factory similar specifications and not for oversized or bored engines. I hope this helps. Happy shopping.