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Borderlands 4
How to Unlock Yabai Head
☆ How Rush Saved Mercenary Day (Bounty Pack 1)
★ 12 active SHiFT Codes as of December 4, 2025
☆ Black Market Location
★ Elemental Weakness Chart
☆ Legendary Weapons
★ Builds: Vex | Amon | Rafa | Harlowe
The Yabai head is an exclusive customization for Vex in Borderlands 4. See how to get the Yabai head, a preview of the cosmetic, and the challenge required to unlock it.
List of Contents
How to Unlock Yabai Head
Purchase All SDU Upgrades
To get the Yabai head for Vex, you must complete the economy challenge called Ammomaxxing Storagepilled Inventorycel. This challenge requires you to purchase and unlock all SDU upgrades.
You will need a total of 3225 SDU Tokens to purchase all the upgrades.
Upgrade All Decks to Max in SDU Menu
SDU Upgrades are purchased in the SDU Menu using SDU Tokens. Upgrade the eight storage decks to maximum capacity for all weapon types (Pistol, Assault Rifle, Sniper Rifle, SMG, Shotgun), Bank slots, Backpack, and Lost Loot slots to complete the Yabai challenge.
Keep in mind that each time you purchase a new slot, the next upgrade for that storage deck will cost more SDU tokens.
Get SDU Tokens from Clearing Objectives and Collectibles
You can get SDU Tokens by completing various objectives and collectibles across the map. Objectives involving defeating enemies such as clearing Safehouses, Silos, Bunker and Mines yield the highest amount of SDU Tokens, so if you plan to farm you can take on those.
Vault Symbols give the least amount of tokens so there is no need to specifically hunt for them, just inspect one when you come across it.
| Point of Interest | How to Earn SDU Token |
|---|---|
| Safehouses | Unlock Safehouses. |
| Silos | Capture Order Silos. |
| Drill Sites | Clear Ripper Drill Sites. |
| Mines | Clear Abandoned Mines. |
| Bunkers | Complete Order Bunkers. |
| Crawlers | Scavenge Ancient Crawlers. |
| Propaganda Speakers | Survive waves of enemies after activating the speaker. |
| Evocariums | Solve Evocarium Puzzles. |
| Loot Capsules | Place found Loot Capsules in Capsule Machines. |
| Electi Safes | Open Electi Safes. |
| Survivalist Caches | Find and open Survivalist Caches. |
| Shrines | Meditate on Auger Shrines. |
| Vault Symbols | Interact with Vault symbols. |
Vex's Yabai Preview
| Yabai | |
|---|---|
 |
|
| Type | Head Cosmetic |
The Yabai head is part of the Slayer Collection cosmetics theme.
Borderlands 4 Related Guides
All Cosmetics and Customization Options
All Customization Types
| Customization Types | |
|---|---|
| Amon | Harlowe |
| Rafa | Vex |
| ECHO-4 | Vehicle |
| Weapon | |
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How to Unlock Yabai Head
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