I've installed the aluminum front crossover from Amazon on a 2014 Sport HSE, and has been working great for 7,000+ miles, I liked the idea of not having plastic in contact with the heating cycles of the engine block. The one issue I encountered was that the O-ring provided was too large and sheared when installing so replaced it with the correct size and it installed correctly and worked well. I also replaced plastic oil cooler inlet with an aluminum one. I would have also done the rear crossover, however wasn't available at the time of the repair and they are now available on Amazon. They also have a thermostat and aluminum housing available on Amazon, however thermostats go bad and you usually have to purchase the entire housing so may make sense to go with OEM or solid aftermarket like Motorad which is mfgd in Israel.