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RR Racing Lexus 3XX OBD ECU Upgrade Tune for 2017
RR Racing Lexus IS350, IS300, RC350 and RC300 ECU Upgrade Tune

Our Price: $585.00
Setup Cost: $550.00

Availability: Subject to availability
Product Code: IG3XXTNE17

RR Racing 3XX Intake:

My Lexus Model*:

My Model Year*:


Please note the following important facts:

1. RR Racing Carbon Intake for Lexus XS350 (ISXITK0001) is now available as a discounted option with this tune. You will get more consistent power gains and a better throttle response installing our Carbon Intake system.

2. If you are converting your Lexus into a dedicated race car, you can also buy a package that includes PPE Headers and Ark Grip exhaust (see separate product under Performance Upgrade category). Please contact us, if you are interested to purchase a Performance Package for 2017.

3. To buy this tune with just an exhaust, please buy it as an option with one of the exhaust products we offer.
Please contact us, if you are interested to purchase a Performance Package for 2017.

4. The cost of this product includes $500 deposit for the tuning tool that will be refunded when the tool is returned.

This tune is for the following models with 2GR-FSE 3.5L v6 engine: IS350 and IS300 2017, RC300/350 2017. **TUNING FOR 2018+ IS/RC & 2016+ GS MODELS IS CURRENTLY NOT AVAILABLE**

RR Racing is proud to release another tune for the Lexus IS/GS platform. The Lexus 300/350 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 especially excited to report the results of our IS300 tune. Now IS/RC300 owners can have all the power of an IS/RC350 at a fraction of the cost, by simply recalibrating the ECU!

So as you can see this was not a weekend project for us, where we slapped a Lexus on the dyno, played around a bit for a day or weekend, and and now we are selling a tune. 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:

  • Direct Injection / Port Injection fuel mapping
  • Ignition control (300/350 has base ignition maps, cam timing dependent ignition maps, knock correction maps)
  • Variable cam maps
  • Torque to throttle mapping (allows us to enhance throttle response)
  • Rev limit increase to 7200 RPM (helps the power curve)
  • Raises the shift points to higher rev limits (higher shift rev points require use of paddle shifters for maximum performance)
  • Raises the speed limit

Our on road impressions are that the 300/350 pulls much more smoothly and linearly, with excellent midrange and top-end improvement. One of the most effective changes to the 300/350 is increasing the rev limit to 7200rpm. As you can see from the dyno results below, the 2GR-FSE v6 continues to pull all the way to the revised 7200 rpm rev limit (AWD only). This results in significantly more "area under the curve" and better acceleration times (for AWD).

We estimate consistent gains of 10 whp gains with this tune over a stock car, and 15-26 whp when equipped with a full cat-back exhaust. With tune, exhaust, and headers the gain is 38 to 48 whp (65 to 75 whp for 300)!

All of our extensive dyno testing is conducted in our testing and development facility on a top-notch brand new Dynojet 424x all wheel drive Dyno equipment.

Our tune results are summarized in the following table with supporting dyno graphs below. Please note that you will experience more consistent gains below with our Carbon Intake System as well as a better throttle response.



Please note that the above chart was done by our customer.

Ordering Procedure

  • Please select this product and chose the required model year option as well as any other options desire.
  • Please note that the tune already includes maps for all other common mods such as headers and exhaust.
  • We will ship you the tuning tool that runs on a Windows PC.
  • The car needs to have the latest Lexus calibration file implemented by your Lexus dealer
We recommend to read our technical tuning blog for more useful information about tuning.

If we make any version updates to this tune, we will make any such version updates available to our customer free of charge.

Important Disclaimer
RR-Racing cannot ensure the applicability of manufacturer's or third-party warranties after performing this modification. Likewise, RR-Racing does not provide any warranty, written or implied, to the engine or drivetrain of your vehicle. RR Racing is not responsible for any accident caused by the use of our products and ECU upgrade -- our products are intended for race track use solely at purchaser's risk. By buying this product, you agree to the terms of this disclaimer.

The tuning tools that we ship are relatively easy to use and they come with step-by-step instructions. There is a need for a Windows based computer to download and upload files from the device. Basic ability to use personal computers and install software and drivers is required.

RR Racing cannot guarantee to be able to tune certain non-US vehicles. If we cannot tune a non-US vehicle, we will refund the cost of the tune upon return of the tuning device. Shipping cost is the risk of the customer and is not refundable. For some 2017 US vehicles there may be a remote possibility that we do not have the required calibration file. In this case, we can download the calibration file from car's physical ECU. If customer cannot ship us his ECU, and we cannot get the calibration file, we will refund the cost of the tune once all the equipment is returned to us.

Other FAQs:

Why do you provide a range of “tuned gains,” not a precise value?
There are many factors that influence dyno results and lead to variability in power measurement. Additionally, your ECU is constantly making changes based on sensor feedback that significantly influence engine output – and this is the case even on a stock ECU. So bottom line is that regardless of the mod you install, actual gains will vary. We make every effort to provide actual, factual, and transparent dyno data for our customers.

Do you recommend aftermarket intakes?
At this time, we do not recommend any aftermarket intakes that remove the factory airbox.

Can you work with me or my tuner to improve my tune?
In most cases yes. If you plan on taking your car to the dyno, please contact us ahead of time in order to discuss the type of datalog data we need in order to fine tune your ECU, should it be required. In most cases, custom tune fees will range from $200-$300. Please note that we do not release our maps and do not provide other tuners software they can use to modify our tunes.

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great product January 15, 2023
Reviewer: Justin Taflinger from Loma Linda, CA United States  
Absolutely love this product, made a huge difference overall. Still have the reliability and the peace of mind knowing RR is always there for you if you have any issues

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