Stock totally except for the Z1 25 row oil cooler. No need for anything else. Zero issues around here in Europe, and on the Autobahn I have no problems with stock power available at all. I have had zero inclination to alter the Z.
I have modded/ tuned before including an Audi, Lotus Turbo Esprit and an Abarth 500 to name a few. To each his own with what you want or need in your ride.
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