Full Answer
Custom features are the thing that most clearly separates ATLAS from flashing a conventional map. They are not adjustments to tables the ECU already has - they are new logic compiled into the tune through the software's visual logic node graph, adding capability the factory ECU never shipped with.
ATLAS provides a first-party custom feature library, free, and the VB WRX was the first platform to get it. The documented FA24DIT features are:
**Speed density.** Replaces reliance on the MAF sensor with ideal gas law calculations using TMAP sensor readings, tuned through two volumetric efficiency tables. The stated benefits are smoother operation, more precise fuel trims, and tolerance for intake modifications.
**Ethanol flex fuel over CAN bus.** Measures ethanol content and adapts fuel target and ignition timing automatically, unlocking additional ignition timing from ethanol's knock resistance.
**Altitude boost rescaling.** Keeps boost targets consistent across altitudes rather than scaling relative to sea level. Aimed at high-elevation areas.
**Launch control.** Lowers a configurable launch point, defaulting to 4100 rpm, when the clutch is engaged, a gear is selected and the car is stationary.
**Boost by gear.** Per-gear boost targeting, useful for limiting boost in a specific gear.
**Oil pressure safety**, for 2022-2023 manual cars. Monitors oil pressure through an aftermarket sensor and reduces torque if pressure drops, to protect bearings.
**SI Drive reenablement**, for 2022-2023 manual cars. Unlocks Sport, Sport# and Intelligent modes.
**Shift and knock light.** Flashes the check engine light when feedback knock is active or the engine approaches a shift point, producing an audible alert from the factory cluster.
**Flat foot shift** is listed as coming soon.
Two practical caveats. These features require ATLAS 2026.1 or later, so version matters. And boost by gear cannot be used alongside altitude boost rescaling, because the two perform overlapping functions.
Last updated 8/20/2026