Can You Upgrade Johnny's Jacket?

It is a replica of Johnny Silverhand's original Samurai jacket. The jacket has a rare rarity level and can be upgraded up to legendary provided you have enough crafting components, a high enough crafting level, and appropriate perks. It also has decent stats on it.

Can you upgrade Johnnys clothes cyberpunk?

Each one of Johnny's items arrives in Rare quality when you first acquire them and you will need to spec into Crafting to upgrade them into Legendary quality, which is what you would ultimately want for the EndGame and Expansions.

Can you upgrade Johnny's clothes to legendary?

My dumb ass only just realised you can upgrade Johnny's armour to legendary. Some of the gear gives you a huge speed boost too.