By Marshall on 01/12/2016

Subaru Flex Fuel Is Here!

First, we teased you. Then, we taught you. Now, we empower you.

COBB Custom Features

The time has come! Subaru Flex Fuel is now available via COBB Custom Features. Updates to the Accessport V3 and Accesstuner Pro now allow users to configure their vehicles to run a true flex fuel setup. Gone are the days of changing maps after every visit to the gas pump. This feature, and MUCH more is all available as a part of COBB Custom Features. With the integration of custom code and monitors, these features are only available on the Accessport V3. If you’re still rockin’ your old trusty V2 Accessport, don’t fret! We have an Accessport Trade-In Program that can lower the cost of a V3 by up to 50%!!

The initial release of COBB Custom Features will include the much anticipated Subaru Flex Fuel Feature along many other improvements to our Subaru offering. A complete list of new features for Accesstuner Pro are listed below!

Flex Fuel Feature (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
Fuel Pressure Differential Feature (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
Custom Sensor Logging Feature (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
TGV Sensor Input Duplication Mode (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
Fuel Economy Display Auto-Correct Feature (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
Per-Gear Wastegate Duty and Boost Targets Feature (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
Speed Density Compatible MAF failure mode (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
40 new Manifold Wall Wetting Comp Tables and 11 new Monitors (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
New A/F Learning #1 Tables (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
New Closed Loop Target Comp Force OL Tables (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
New Ignition Timing Cold Start Comp Tables (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
New Front O2 Smoothing Factor Table (USDM 08-16 STi, USDM 08-14 WRX MT, ADM 15-16 STi)
New BETA toggle for disabling the stratified warm-up strategy (16 WRX 6MT/CVT and 16 FXT)

These features are all available now via Accesstuner Pro! CLICK HERE for the nearest authorized Protuner or COBB Shop for a custom Flex Fuel tune or to take advantage of other COBB Custom Features!

Subaru Flex Fuel Components and Packages

The following components and packages are live and available for purchase immediately! Head over to the COBB store to get your today!

Subaru Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014 (315600) – MSRP $600.00

Subaru Fuel Pressure Sensor Kit – STI 2008-2016, WRX 2008-2014 (315650) – MSRP $225.00

Subaru Flex Fuel Package – WRX 2008-2014, STI 2008-2016 (315F03) – MSRP $800.00

Flex Fuel Ethanol Sensor
Kit Fuel Pressure Sensor Kit

Accessport + Subaru Flex Fuel + Fuel Upgrade Package – STI 2015-2016 (316F01) – MSRP $2,100.00

Subaru Accessport V3 (AP3-SUB-004)
Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
Subaru Fuel Pressure Regulator Kit – STI 2008-2016
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI

Accessport + Subaru Flex Fuel + Fuel Upgrade Package – STI 2008-2014 (315F01) – MSRP $2,100.00

Subaru Accessport V3 (AP3-SUB-003)
Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
Subaru Fuel Pressure Regulator Kit – STI 2008-2016
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI

Subaru Flex Fuel + Fuel Upgrade Package – STI 2008-2016 (315F02) – MSRP $1,690.00

Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
Subaru Fuel Pressure Regulator Kit – STI 2008-2016
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI

Subaru Flex Fuel + Fuel Upgrade Package – WRX 2008-2014 (315F05) – MSRP $1,410.00

Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI

Subaru Stage 3 + FF Power Package STI Hatch 2008-2014 (615X23FF) – MSRP $4340.00

Subaru Accessport V3 (AP3-SUB-003)
Subaru SF Intake System
Subaru SF Airbox
Subaru SS 3″ Downpipe
Subaru SS Turbo Heatshield
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
COBB Vehicle Badge
Subaru SS 3″ Cat-Back Exhaust
Subaru Fuel Pressure Regulator Kit STI 2008-2016
Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016

Subaru Stage 3 + FF Power Package STI Sedan 2011-2014 (615X43FF) – MSRP $4,340.00

Subaru Accessport V3 (AP3-SUB-003)
Subaru SF Airbox
Subaru SF Intake System
Subaru SS 3″ Downpipe
Subaru SS Turbo Heatshield
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
COBB Vehicle Badge
Subaru 11-14 WRX/STi Sedan Cat-Back Exhaust System
Subaru Fuel Pressure Regulator Kit STI 2008-2016
Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016

Subaru Stage 3 + FF Power Package STI 2015-2016 (616X30FF) – MSRP $4,640.00

Subaru Accessport V3 (AP3-SUB-004)
Subaru SF Intake System
Subaru SF Airbox STI 2015-2016
Subaru SS 3″ Downpipe
Subaru SS Turbo Heatshield
Subaru AEM High Flow Fuel Pump 2005-2009 LGT, 2008-2014 WRX, 2008-2016 STI
Subaru Top Feed 1000cc Fuel Injectors – WRX 2002-2014, STI 2007-2016
COBB Vehicle Badge
Subaru SS 3″ Cat-Back Exhaust 2015-2016 WRX / 2015-2016 STI
Subaru Fuel Pressure Regulator Kit STI 2008-2016
Flex Fuel Ethanol Sensor Kit – STI 2008-2016, WRX 2008-2014
Fuel Pressure Sensor Kit – WRX 08-14, STI 2008-2016

COMMENTS

Brad Bright on January 12, 2016 says:

Must… have… 07 sti flexfuel… lol

Brian Busse on January 12, 2016 says:

07 Legacy GT spec.B checking in on any news whatsoever for support…. ?

Ernie Forbes on January 13, 2016 says:

You guys working on flex kit for GTR

Marshall on January 13, 2016 says:

Hey Ernie, we do not currently have plans to offer a plug and play kit for the GT-R. There are others already available that do a great job and work very well with our GT-R Flex Fuel software.

Marshall@COBB

Ernie Forbes on January 14, 2016 says:

Thank you

Marc Newman on January 14, 2016 says:

“New BETA toggle for disabling the stratified warm-up strategy (16 WRX 6MT/CVT and 16 FXT)”

Will this be available for the ’15 WRX as well?

Also, what’s the timeframe for ’15+ WRX FlexFuel?

Thanks

Marshall on January 14, 2016 says:

Hey Marc,

This feature will potentially be available for the 2015 WRX upon further investigation and testing. DIT WRX Flex Fuel is actively being worked on, I would expect to see more developments on that in the next few months!

Marshall@COBB

basel hamad on March 2, 2016 says:

Are there still plans to release an OTS Stage 3 FF map?

Marshall on March 4, 2016 says:

Yes! We are now aiming to release those maps by the end of March.

Marshall@COBB

Jarrett Tubb on January 19, 2016 says:

will I need a new fuel pump? I currently have a dw65.

Marshall on January 20, 2016 says:

I believe Deatschwerks claims that pump is ethanol compatible. It’s not one that we tested during our development but I assume it would be up to the task.

Marshall@COBB

Paul Hughes on January 19, 2016 says:

If I am running top feed Injector Dynamics 1000cc injectors, will the maps you guys are creating work with my injectors, or would they only work exclusively with the injectors in the kits?
Also, I am anxiously waiting on a kit for the 4th gen Legacy GT. #LegacysMatter

Marshall on January 20, 2016 says:

Hey Paul, we’ll have more information on that with the release of Flex Fuel OTS maps. In short, you -should- be just fine with the standard ID 1000s.

Marshall@COBB

Mark Meiller on January 20, 2016 says:

So in another post you mentioned that we should expect up to a 10% improvement in power from running e85, which for my 2009 wrx should put me at maybe 320-330 whp/ft lbs(assuming all the planets line up correctly and the car fairy gives me an extra sprinkling of pixy dust.) In your opinion how reliable is the ej255 and 5 speed transmission at that power level? And can I run that much power without messing with the engine internals? Also do you guys have any recommendations for clutches at that power level?

Marshall on January 20, 2016 says:

Hey Mark!

Exact power output would obviously vary slightly depending on conditions, dyno, and vehicle setups. An employee here with a 2014 WRX recently made around 330whp/380wtq on an E85 tune. That power level proved to be more than the factory clutch could take as it began to slip at higher loads. The car was dialed down a bit to save the clutch and has been perfectly reliable since then. I would say that’s probably about as far as I would take the factory motor and transmission in those cars before reliability becomes a concern.

Marshall@COBB

jeff reger on February 2, 2016 says:

When should we see OTS maps for Stage 3 +Flex Fuel?

Marshall on February 4, 2016 says:

Hey Jeff,

We’re hoping to finalize Stage3+FF maps for the 2015-2016 STI in the next couple of weeks. 2008-2014 STI maps will come shortly thereafter.

Marshall@COBB

Sean Rosen on February 3, 2016 says:

Any news for release date for 2006 sti? Waiting patiently

Marshall on February 4, 2016 says:

Hey Sean, we are not yet close enough to estimate a release date. Our current priority is with DIT WRX, GD WRX and STi support will follow.

Marshall@COBB

Roland Guarin on February 19, 2016 says:

Any update on the DIT WRX? My car has been asking me for corn.

Marshall on February 22, 2016 says:

We are continuing to investigate Flex Fuel for DIT WRX. No ETA quite yet, though!

Marshall@COBB

Robert Vickers on February 15, 2016 says:

Any date you think you will have the FF maps out for the 208-2014 sti? This is the only thing holding me back right now from dropping the money on it and every day I think more that I’m not needing it and look for other items to spend the money on.

Marshall on February 15, 2016 says:

Hey Robert! No updates on the 2008-2014 STI Flex Fuel OTS Maps quite yet. We’ve been dealing with some dyno woes here recently and are hoping to be operational again very soon! – Marshall

David Lapham on February 25, 2016 says:

I have an 04 STi, so I am waiting for confirmation that Flex Fuel will be released for it before I upgrade from my AP V2 to V3. Will access tuner race support flex fuel, or just pro?

Thanks,
-David

Marc Newman on March 14, 2016 says:

Marshall, any news on FA20DIT Flex Fuel?

Thanks.

Marshall on March 15, 2016 says:

We had a bit of a set-back with Subaru’s recent recall, I would optimistically estimate a Summer release for DIT Flex Fuel.

Marshall@COBB

Patrick Travica on March 14, 2016 says:

You guys need to stop tickling our you know what and release flex fuel for the 04-07 STI. I know more people who drive those years of cars than the 2008 and up STI’s! Please!!!

Brian Busse on March 23, 2016 says:

Just following up to find out if there has been any news regarding the 05-09 Legacy GT (specifically, i care about the 2007 as I own an ’07 spec.B) as far as Flex Fuel goes. I already have most of the components necessary for this and recently switched over to E85.

If one is not available, i’d even consider bringing my car to you to use for testing if necessary. (i’m in Omaha, NE)

Marshall on March 24, 2016 says:

Hey Brian, we don’t really have any updates on that front right now. We have been collecting all of the requests and the Legacy crowd definitely has a strong showing. As it currently stands, additional Flex Fuel support would come after both the DIT WRX and GD WRX/STI releases.

Marshall@COBB

almir zohorovic on May 6, 2016 says:

Following up on the progress you guys have made on releasing the flex-fuel sensor for the 06-07 STi model? ETA? I have all the other parts on hand

Thanks!

Marshall on May 6, 2016 says:

Hey there, we are still planning to release Flex Fuel for the GD-chassis STi near the end of this year. Once we have completed and released Flex Fuel for the 2015+ DIT WRX we will have a better estimate on a timeline.

Marshall@COBB

James Kovach on May 9, 2016 says:

Hi, i am just wondering when the flex fuel kit will be released for the 2015 wrx.

Marshall on May 10, 2016 says:

Hey James! We’re shooting for a summer release for DIT WRX Flex Fuel.

Marshall@COBB

James Kovach on May 31, 2016 says:

any updates on the flex fuel for DIT ?

Marshall on May 31, 2016 says:

We are still shooting to have something available by the end of this summer! Hoping to have some significant updates for everyone in the next month or so.

Marshall@COBB

James Kovach on June 13, 2016 says:

i know i asked multiple times, but just really anxious to know when the release for the DIT will be?

Marshall on June 14, 2016 says:

Hey James, we’re still on pace for a hopeful late-Summer release. Small delay to add vehicle support for the 2017 WRX/STI and then we’ll be right back on Flex Fuel!

Marshall@COBB

Bartholomew Hott on June 20, 2016 says:

For the 2015+ WRX will an OTS map be available at release?

Marshall on June 20, 2016 says:

That has not yet been decided. I can say that if an OTS map is available, it will likely be limited to around a 30-40% ethanol blend.

Marshall@COBB

James Kovach on July 11, 2016 says:

what does a late-summer release actually mean? august? for the 2015 wrx

Kyle on July 11, 2016 says:

Hi James,

The current track is looking like late September.

Kyle@COBB

Darod Hatter on July 17, 2016 says:

What’s all needed for the kit?

Marshall on July 18, 2016 says:

That’s a relatively open-ended question. You can, in theory, install the Flex Fuel Ethanol Sensor Kit onto a supported vehicle and have a Flex Fuel tuned car. Most applications will require upgraded fuel system components in order to support the additional required fuel flow from a high ethanol content fuel. So, it really depends on what the vehicle’s setup is and the end goals.

Marshall@COBB

Darod Hatter on August 15, 2016 says:

Do you guys have any updates on the FF kits for the 2015+ WRX?

Marshall on August 16, 2016 says:

We’re making great progress on both the hardware and software implementations for DIT WRX Flex Fuel. Hoping to have that available as a complete solution in the coming months. We were unfortunately delayed a bit with adding MY2017 vehicle support so our Flex Fuel timeline has slipped a bit.

Marshall@COBB

James Kovach on September 2, 2016 says:

Hey any updates on the flex fuel kit for the DIT WRX?

Marshall on September 6, 2016 says:

We are getting there! Hoping to have something available around the end of this month.

Marshall@COBB

Darod Hatter on September 17, 2016 says:

Will 2015+ WRX flex fuel kit be in the same price range as the STI kits?

Marshall on September 19, 2016 says:

Yep, it should be as the hardware is very similar!

Marshall@COBB

Brian Busse on September 18, 2016 says:

Trying not to pester. Checking in again for Flex support on my 2007 spec.B :) My Cobb certified tuner would love to get me in for this…. when available :)

Marshall on September 19, 2016 says:

We do plan to investigate adding Legacy Flex Fuel support after the GD Flex Fuel project is complete. Current timeline slates that investigation for early 2017 at which time we should have a better idea on development efforts and a rough release timeframe.

Marshall@COBB

James Kovach on September 19, 2016 says:

sorry i probably commented 10 times on this page, but i can’t wait for the flex fuel kit release for the FA WRX :), any updates?

Marshall on September 20, 2016 says:

We’re getting there!

Marshall@COBB

Darod Hatter on October 1, 2016 says:

You guys almost there?

Marshall on October 4, 2016 says:

Getting very, very close!

Marshall@COBB

Darod Hatter on October 23, 2016 says:

Rumors going around on forums that you guys are giving up on the 2015+ WRX flex fuel kit. Is this true?

Marshall on October 24, 2016 says:

That is definitely not true at all. I drove our shop 2015 WRX with a production Flex Fuel kit and tune just this weekend. It should be released very soon!

Marshall@COBB

James Kovach on November 10, 2016 says:

when exactly is it going to be released? i’ve been waiting patiently for months now :)

Marshall on November 11, 2016 says:

For which platform? We’re merely days away from the Subaru DIT release and GD WRX/STI Flex Fuel will likely come in early 2017.

Marshall@COBB

James Kovach on November 11, 2016 says:

Yeah im waiting for the DIT release, can you post a link when it is available for purchase?

Marshall on November 14, 2016 says:

Absolutely, we’ll make announcements on all of our usual channels once it’s available!

Marshall@COBB

Josh Grothe on January 19, 2017 says:

Any good news on the LGT support, Marshall? Looking forward to blowing my tax refund on something necessary lol.

Marshall on January 30, 2017 says:

Hey Josh!

It’s next up on the priority list so we’re hoping to have some good news shortly.

Marshall@COBB

Nick Pianelli on February 7, 2017 says:

Hey Marshall think we will see the GD flex fuel released this month ?

Marshall on February 7, 2017 says:

It likely will not be available this month, our current estimate is showing sometime in March.

Marshall@COBB

Jason Brown on February 20, 2017 says:

Hey Marshall, I notice on one of the above comments on March 4, 2016 that yall had plans of releasing OTS maps for 2015+ sti Stage 3 FF by the end of march of 2016. So its been almost a year and no OTS map yet. Are yall still planning of releasing a OTS map? If so, when do you think?

Marshall on February 20, 2017 says:

Those plans did indeed change and we no longer have plans to offer an OTS Flex Fuel option.

Marshall@COBB

John Frith on March 9, 2017 says:

Any plans for this becoming available for 2007 FXT MT? Would love to have this as an option.

Marshall on March 16, 2017 says:

We do not currently have plans to implement Flex Fuel on the Forester platform however if demand is seen we can certainly look into it.

Marshall@COBB

Elvis Zhirzhan on April 19, 2017 says:

Hi, Guys any news on Flex Fuel for the LGTs?

Marshall on April 19, 2017 says:

We do not have any new information related to LGT Flex Fuel. Once GD Flex Fuel has been finished up and released we should be able to do some additional investigation.

Marshall@COBB

Elvis Zhirzhan on April 19, 2017 says:

Thank you Marshall.

Brian Busse on April 21, 2018 says:

07 Legacy GT spec.B owner following up again. Any news to share? Still plans for this platform or is that getting less likely? (already running straight E85, would really REALLY like to be FLEX)

Marshall on April 24, 2018 says:

Good news! Legacy Flex Fuel is currently being worked on. Unfortunately not close enough to provide any sort of ETA.

Marshall@COBB

christian neville on April 27, 2018 says:

Been waiting for flex fuel for my Lgt since 09. E85 is not reliable here in North East. I would buy the kit the second it’s available.

Marshall on April 30, 2018 says:

Hoping you don’t have to wait much longer!!

Marshall@COBB

lorin sabin on March 27, 2019 says:

when does the 02 wrx get awesome flex fuel?

Marshall on March 29, 2019 says:

Hey there! We do not currently have plans to offer a flex-fuel solution for the factory 2002-2005 WRX ECUs.

Marshall@COBB