Evo is the name that Steve Vai has given to his primary stage and recording guitar, an Ibanez JEM7VWH.

[1] Vai was sent four production models when they came out and started playing them all in an effort to decide which one to use on a longer-term basis.

Evo is largely identical to a stock JEM7VWH,[2] sporting an Ibanez Edge tremolo, 24-fret neck, and Dimarzio Evolution pickups.

Due to the guitar's extended service to Vai, coupled with his aggressive playing style, Evo currently suffers various fallibilities, both aesthetic and structural.

Some of these are irreparable, and consequently Vai has resorted to playing Flo more than Evo, to extend its stage life.