Just as the title says, is adding one of these to a 2017 John Cooper Works that is completely unmodified otherwise worth it? I have used this on a 2015 mini Cooper three cylinder and a 2014 Mini Cooper four-cylinder S and both of them had great results, but I feel like the John Cooper Works might be a different beast and I’m unsure if using this is a good idea or worth it.

Thanks for any thoughts from someone who has tried this on a JCW