Class X is unrestricted Performance Index (999) — anything goes for power, aero, and exotic builds. These pages collect community share codes for cars pushed past normal class caps, so titles and notes matter even more than in bracketed classes.

X-class tunes vary wildly: some are serious race conversions, others are experimental playground builds. Read titles and notes carefully before you download, and confirm the discipline matches what you want to drive.

Because the bracket has no upper PI limit beyond the class label, context matters more than a raw upvote count. Prefer setups that state road, street, drag, or another discipline clearly on the tune page.

If you do not see a tune for your car, share one from the submit flow. Empty X-class results mean the community list is still waiting for tested codes — we do not invent fake share codes to fill the grid.