NAMR Speed Density Custom Feature for 2015–2021 WRX VA and 2022+ WRX VB

Speed Density Custom Feature - VA/VB WRX

$0.00

Speed Density Custom Feature - VA/VB WRX

Name: Speed Density Custom Feature - VA/VB WRX
Brand: NAMR
SKU: NAMR-CF-SD-VB
Availability: InStock

$0.00

Delivery: Digital software feature, delivered manually by email after processing. No physical item is shipped.
Required: Check the supported chassis, Atlas version, and required hardware in the description. Calibration is sold separately.

Need help choosing? Contact us.

After ordering

Use an email address you can access at checkout. Confirm the supported chassis, transmission, Atlas version, and any required hardware before ordering.
Free feature files are emailed manually after order processing. Paid feature licenses are processed for the VIN entered above. Delivery is not an instant automated download.
Custom calibration and required hardware are separate. Contact GropeTuned with your order number if you need help with delivery or compatibility.

Send your order and setup details

NAMR custom feature, available through GropeTuned, an official Atlas commercial tuner.

NAMR feature description

Speed density fundamentally changes the way your ECU measures air by applying the ideal gas law to your intake manifold’s environment via TMAP sensor readings.

This custom feature removes dependency on your MAF sensor and instead permits you to directly calibrate your airflow using the two Airflow - VE - Volumetric Efficiency tables. As such, tuning speed density is different than MAF.

Speed density tunes feel “smoother”, have more precisely dialed fuel trims, and can be more tolerant of modifications or leaks in the intake side of your engine (such as blowoff valves).

Feature requirements

Supported chassis: 2015–2021 WRX VA and 2022+ WRX VB
Version: 1.3
Released: 8/23/2026
Requires: Atlas 2026.1+

Digital software feature by NAMR. Custom calibration and any required hardware are sold separately.

This software feature is $0. GropeTuned’s Speed Density Tune Add-On — $100 covers the separate calibration work.

Delivery and purchase terms

GropeTuned will manually email the free feature files after processing your order. Delivery is by email, not an instant automated download. Use an email address you can access at checkout.