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Why oh why do we need to upgrade the intake system?
The combustion process is one of the most important processes that dictate a car's overall performance, therefore a good intake is good for the ride, but a better intake can totally perfect those numbers.
The owner of this X253 GLC63S AMG chose to have it upgraded with a carbon fiber intake system, made by Eventuri.
Air capacity is increased due to a 39% larger air box, thermal insulation is much better due to the dry carbon fiber material, and smoothness is also increased, due to the design of the air box and pipes.
Pair all that with the proprietary high-flow air filter, and you get a noticeable increase in performance.
Speaking of performance, the test data provided by Eventuri shows a 12hp increase, but if you also have remap done, you can easily bump that up to 30.