X-Flow is a tuning company in Grand Theft Auto: San Andreas. Wheel Arch Angels offers X-Flow brand exhausts, bodykits, roof scoops and spoilers, as well as an X-Flow-themed paintjob for the Sultan and possibly the Jester. This Jester paintjob is seen on a model car box in Zero RC for the "Jester Crossflow", and with "cross" and "X" meaning the same, it could be read as "X-Flow".
X-Flow logo.
X-Flow paintjob for the Sultan.
Possible X-Flow paintjob for the Jester.
The "Jester Crossflow" box showing this paintjob.