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TUNING
EXPLORE THE BUILD
Italian RP GR Corolla Pistons and Rods
$3,824.15
Zestek GR Corolla Racing SCX Wheel Hub
$1,049.95
Eventuri GR Corolla Carbon Intake System
$1,645.00
GR Corolla Tuning FAQs
We tune the GR Corolla with EcuTek through LIMIT+1 x Boosted Performance Tuning. It is offered as an EcuTek phone flash custom tune or an in-person custom dyno tune, and existing customers can order a tune revision.
A custom tune is written for your specific parts and fuel rather than loaded from a generic map. Details of each option are listed on its product page, and tuning is non refundable once a tune file has been sent.
Toyota rates the 2025 and 2026 GR Corolla at 300 horsepower and 295 lb-ft of torque, and earlier Core, Premium and Circuit Edition models at 300 horsepower and 273 lb-ft. The gain from a custom EcuTek tune depends on fuel, ambient temperature and which supporting parts are installed, such as a downpipe, an intake or the LIMIT+1 x Delicious Tuning GR Corolla Flex Fuel Kit for E85.
Contact us with your build and we can talk through what to expect from LIMIT+1 x Boosted Performance Tuning on your car.
Under the Magnuson-Moss Warranty Act, a dealer cannot void an entire factory warranty simply because aftermarket parts are installed. A specific claim can still be denied if a modification is determined to have caused the failure, and ECU changes are detectable. Warranty decisions are made by Toyota and its dealers, not by LIMIT+1.
New, uninstalled parts in original packaging can be returned within 30 days of shipment, subject to a 25 percent restocking fee, with return shipping paid by the customer. Installed parts, custom and special order items, fluids, and other consumables are not eligible for return, and tuning is non refundable once a tune file has been sent. Inspect your order on delivery and contact us immediately with photos if anything arrives damaged or incorrect.
Toyota GR Corolla Tuning and Custom ECU Calibration
A GR Corolla tune is what turns parts into power. This collection covers LIMIT+1 custom Ecutek tuning, licenses, cables, and the calibration services that match your ECU to your specific hardware, fuel, and climate.
The G16E-GTS leaves the factory at 300 horsepower and 273 lb-ft, with airflow and calibration as the limiting factors rather than the hardware itself. A custom GR Corolla tune with basic bolt-ons commonly adds 40 to 60 wheel horsepower on pump gas, and a flex fuel kit running E85 pushes that considerably further. Results vary with fuel quality, ambient temperature, and which supporting modifications are installed.
Our tunes are written for your car, not loaded from a generic map. We adjust boost, fueling, timing, and torque limiters to suit your combination of downpipe, intake, and intercooler, and you receive the license, the file, and support for revisions as the build changes. Bolt-ons can be installed without a tune, but the factory calibration will not use the added airflow and some combinations set check engine lights.