Hydraulic Cylinder is an item You can pick up in Final Fantasy XV. You need this item in order to complete the A Better Gravity Well quest. When you have the item, visit Cid in his garage in Hammerhead. He’ll use it to upgrade your Gravity Well. In this guide, we aim to show you all of the Final Fantasy XV Hydraulic Cylinders locations.
Note: This guide is a work in progress. We’ll update it as we discover new locations.Like many other items that are labeled as treasure items, the Hydraulic Cylinder seems to be fairly useless to the player. Other than selling it for gil, it doesn’t appear to have any purpose. Hold off the selling just yet, though. The Hydraulic Cylinder is absolutely necessary to complete the Better Gravity Well quest. Essentially, once you get this item, you should pay Cid the mechanic a visit as soon as you can. Unequip the Gravity Well if it’s equipped, then give both the weapon and the Hydraulic Cylinder to Cid. Through his amazing tinkering skills, Cid will use the Cylinder to turn the Gravity Well into an improved version called Gravity Well II. This might take some time to complete, so you’ll want to do some side questing or cruise around in the Regalia to kill some time. When you come back to pick up the finished weapon, you’ll be awarded some EXP and a more powerful weapon.
Note: This guide is a work in progress. We’ll update it as we discover new locations.