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2020 WRX CVT Support and Accesstuner Pro HL Update


Subaru’s 2020 WRX CVT is now fully supported within the COBB product line.  We have confirmed fitment of our bolt-on upgrades such as the Big SF Intake System, 3″ Turboback Exhaust (both Resonated and Non-Resonated), and Air/Oil Separator.  The SUB-004 Accessport comes loaded with Off The Shelf Maps to support all of our common bolt-on upgrades.  For those interested in taking their 2020 WRX beyond the scope of our Stage Power Packages and Off The Shelf Maps, Subaru Accesstuner and Accesstuner Pro both now offer full tuning support, including COBB Custom Features.

For a complete list of compatible parts, visit the 2020 Subaru WRX CVT USDM Vehicle Page on the COBB Tuning website!

Subaru Accessport V3 (AP3-SUB-004)

accessport_v3_subaru The Accessport is the world’s best selling, most flexible, and easiest to use ECU upgrade solution for your Subaru. Unlock power hidden within the vehicle by replacing conservative factory settings with more aggressive calibrations. Follow our staged upgrade path with pre-loaded Off The Shelf (OTS) maps or use custom mapping for any modification level. It’s the last engine management solution you’ll ever need.

Subaru Accessport V3 (AP3-SUB-004)

Off The Shelf Maps

Off The Shelf Maps for the 2020 WRX CVT use our CCFv2 ECU type, taking advantage of features such as MAF Simple and Closed-Loop fueling to deliver higher, more consistent power.

Each Accessport comes pre-loaded with an assortment of Off The Shelf Maps that support from a completely stock car up to a car with a full turboback exhaust and COBB Big SF Intake System.  Map files are available for cars using either 91 or 93 octane fuel.  Stage 1 and Stage 1+BigSF map produces peak gains of +7% HP / +13% TQ over stock and maximum gains of +19% HP / +19%TQ over stock when using 93 octane fuel.

*For a complete explanation of each Off The Shelf Map for the 2020 WRX CVT, visit our Map Notes Page.


The following map files are available for the 2020 WRX CVT via a firmware update through Accessport Manager or via download on the COBB website.

  • Stage0 v350.ptm
  • Stage1 91 v351 HWG.ptm
  • Stage1 91 v351 LWG.ptm
  • Stage1 91 v351.ptm
  • Stage1 93 v351 HWG.ptm
  • Stage1 93 v351 LWG.ptm
  • Stage1 93 v351.ptm
  • Stage1 Economy Mode v351.ptm
  • Stage1 Valet Mode v351.ptm
  • Stage1+BigSF 91 v351 HWG.ptm
  • Stage1+BigSF 91 v351 LWG.ptm
  • Stage1+BigSF 91 v351.ptm
  • Stage1+BigSF 93 v351 HWG.ptm
  • Stage1+BigSF 93 v351 LWG.ptm
  • Stage1+BigSF 93 v351.ptm
  • Stage1+BigSF Economy Mode v351.ptm
  • Stage1+BigSF Valet Mode v351.ptm
  • Vehicle Anti-Theft Mode v350.ptm

Accesstuner Pro HL Update

Subaru Accesstuner Pro receives two updates with this release.  First and foremost, ECU definitions for 2020 WRX CVT are now included for custom tuning.  Our software team has also made improvements to the Map Comparison System to improve accuracy.

2020 WRX CVT Defintions

Two definitions are available for the 2020 WRX CVT, MAF-only and CCFv2.


Map Comparison Update (Visible Differences)

Previously, the comparison may have highlighted values of “0.00” as a change with red text due to rounding differences beyond visible values.  There were also certain workflows that could cause a “-0.00” value to be displayed in red or yellow text.  Moving forward, a value of “0.00” will always be displayed as grey text.  These two issues would often cause unnecessary table reviews when there were not actual changes to review.  Example: Comparing 2015 USDM WRX MT Post-recall 3 CCF Gen2 to 2015 USDM WRX MT Post-recall 2, there were 42 tables with differences whereas now there are only 27 due to these fixes.