Description

Product Features
GReddy offers a wide range of tuning data, from “fine-tuning” modifications—such as speed limiter removal, exhaust upgrades, and boost increases—to setups for vehicles equipped with GReddy bolt-on turbo kits.
We analyze factory ECU data in detail and develop optimized settings through repeated testing and adjustments to ensure peak performance when paired with GReddy parts.

While ECU specifications vary by vehicle model, dedicated specialists use specialized software and equipment to conduct thorough testing across a wide range of driving conditions, from street driving to circuit use.

The programmed setting data is encrypted and cannot be modified or edited by the user, ensuring consistent and stable performance.

For manual transmission models
Bolt-on turbo kit (JB74W TF035) – Compatible with both non-catalytic and catalytic converter-equipped setups
*Non-catalytic version is not street-legal (not compliant with vehicle inspection standards)

For Automatic Transmission (AT) models
Bolt-on Turbo Kit (JB74W TF035) – Compatible with both cat-less and catalytic converter-equipped setups
*Note: Cat-less configuration is not street-legal (does not pass vehicle inspection).
*Note: For AT vehicles with an initial registration date of October 1, 2021, or later, the engine start-stop (idling stop) function will be disabled. Please be sure to verify your vehicle’s model year.

-Important Notes-
・This service requires sending in your factory ECU for reprogramming.
・Reprogramming the ECU may void the manufacturer’s warranty or affect eligibility for dealer maintenance services.
・While dealer-based fault diagnosis remains possible after reprogramming, the ECU may no longer accept dealer-performed software updates (reprogramming).
・The setting data may not be compatible with vehicles equipped with non-specified parts or products from other manufacturers.
・For turbo vehicles, settings are calibrated based on specific boost pressures; do not alter the boost pressure settings.
・All setting data is calibrated for use with 100-octane premium gasoline.
・As reprogramming increases power output, please upgrade your spark plugs to the specified heat range.
・Please note that we cannot be held liable for any issues or malfunctions that occur after the ECU has been reprogrammed.
・The “GReddy Performance ECU for High-Flow Turbine Kit (HA36S)” is calibrated based on the specifications of the R35 GT-R factory fuel pump; please note that an R35 GT-R factory fuel pump is required for installation. This product is compatible only with manual transmission (MT) vehicles.