still under construction please keep checking more items will be added asap
Everything on this site is made to order please allow 5-10 days for shipping if ordering something custom it may take even longer depending on availability of materials

flex fuel subaru pnp ej25


Do not purchase this item until you have asked your tuner if he will tune with this kit I do not and will not offer refunds on this kit.



Why buy my kit? It functions the same scales the same and gives you the same power increase as any other flex-fuel kit. the difference is mine saves you some cash moneyssss and let’s face it you drive a Subaru and an extra 50hp is gonna send you right here … and that’s not gonna be cheap…

full plug and play for Subarus using an ECU that supports the Carberry rom no adapters needed no need to worry about dual avcs or single avcs this plugs right into the rear o2 where u need it!


Flex-fuel kit for Subarus this kit is plug and play but the fuel lines are not assembled. Includes 4 oetiker style hose clamps, 4 feet of gates barricade fuel line, sensor bracket, ethanol content sensor, “plug n play” converter, fuel line disconnect tool, 4 quick connect fittings.

this kit uses the rear o2 connection located right below the pitch stop mount.

it is compatible with most tuning platforms for Subaru if you have a vehicle other than a wrx or sti it is up to you to contact your tuner to confirm compatibility before purchase.

Instructional pictures are based on 08-14 wrx but the install will be very similar on other models

scale for all current kits is .5=0% 4.5=100%




NEW LOW VOLTAGE FAILSAFE .3V (+- .05) INDICATES sensor unplugged (open circuit on white wire or dead sensor)


knowing these new features your tuner can set the cel to come on for high or low voltage in the specified range to provide a higher level of safety for your car

v3 kits will be marked “v3” on the bottom of the converter


if you are using an 02-03 ECU for flex-fuel the easiest way to see your ethanol content is by using this android app you can easily add a custom field using the lookup tables following the instructions here

get the android app here (worth every penny)





name…. ethanol content
addr….. 021030
length…. 2
float…. (blank)
formula…. x/655.36
lookup table…. (none)
dec places….0
gauge min….0
gauge max….100
gauge number every….100



name…. Rear O2 Volts Direct
addr….. 021760
length…. 2
float…. (blank)
formula…. x*5/1023
lookup table…. (none)
dec places…. 1
gauge min…. 0
gauge max…. 5
gauge number every…. 100

download carberry here (please donate to him)




Do not purchase this item until you have asked your tuner if he will tune with this kit I do not and will not offer refunds on this kit.

this item is guaranteed against manufacture defects replacement converters will be shipped after troubleshooting is done with technical support.

the sensors are not guaranteed or warranted they do go bad eventually (ask anyone that works on gm flex-fuel vehicles)

click here to download a pdf instruction manualย 

we are now on a v4 kit basic functionality is still the same it scales the same as always i am using a new single board setup that has a much higher reliability and again further improves accuracy down to .01vย  these are italian made boards and eliminates the need for the external chinese regulators i was having so many issues with. this is a total redesign all new code a much better unit all around.

Out of stock