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RR Racing Lexus 300/350 OBD ECU Tune For FKS

RR Racing Lexus 300/350 OBD ECU Upgrade Tune For FKS

10 Reviews

Usually Ships in 3 to 5 Days

Product Code: IG3XXFKS01

Choose your options:

Carbon Intake:

High Flow Air Filter:

My Lexus Model(required):

My Model Year(required):

Add Header Pipes:

Full E85 Tune:

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Qty:

This product is for the latest model 2gr-fks V6 engines (See compatibility table below) -Please be sure you do not have the early 2gr-fse found in the earlier cars

RR Racing is proud to release our tune for the Lexus IS/RC/GS 2GR-FKS platform. The Lexus ECU is a very complex and sophisticated engine management system. As always, we have worked very hard over a course of many months on developing this tune using our IS350 F Sport shop car as well as our customers' cars. We developed both on the dyno AND on the road. We have thoroughly tested various changes in order to optimize power and torque effectively while retaining stock fuel efficiency, knock control sensitivity, and other built in safety features.

We had done most of our development on the road, under real world conditions, doing hundreds of runs, datalogs, and hundreds of miles of testing between re-maps in order to determine how the ECU reacts to changes and adjust learning parameters. In addition we use our sophisticated in-house AWD DynoJet 424x LINX to fine tune our calibrations. Our ECU tune enhances the following ECU functions/parameters, including but not limited to:

Raises the shift points to higher rev limits between 200-600rpm higher than stock depending on gear.
Raises the speed limiter
Optional e85 tune
Ignition control
Variable cam maps
Throttle Response Enhancement
Direct Injection / Port Injection fuel mapping & fuel pressure

Please note: A Windows based PC Laptop is required to use the tuning software and programming cable we provide.Our tune results are summarized in the following table with supporting dyno graphs below:

Special Note regarding future tune updates: Tune updates for parts purchased directly from RR Racing are free. This applies to headers, intakes, exhaust etc..
RR Racing reserves the right to charge a tune upgrade fee (Example $200) for parts not purchased from RR.

Compatibility Table for cars with late fks engines only
Check your model to be sure it is 2gr-fks:

Make	Model	Year Range
Lexus	IS350	2018+
Lexus	IS300 V6	2018+
Lexus	RC350	2018 +
Lexus	RC300 V6	2018 +
Lexus	GS350	2016 +

REVIEWS

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Average Rating:

( 10 )

Ryan Meren from Gilbert , AZ United States

October 20, 2025

2021 IS300 AWD

I installed this tune on my 2021 IS300 AWD (base) along with the carbon intake tube. Installation was easy/straight-forward. Download software and drivers, receive tune via email from RR-Racing, and follow the instructions. Made sure my battery was fully charged and kept it on a battery tender during the process. Torque curve feels linear all the way up to redline. Acceleration no longer falls fla