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Free UPS shipping · 30-day returns · Limited lifetime warranty$279

Designed in the USA · Ships from Little Rock, Arkansas

Monte GT

Everyday tuning, controlled from your phone.

$279or 4 interest-free payments of $69.75 with Affirm

Calibrated for your engine · 30-day returns · Limited lifetime warranty

Monte GT

The Monte app

One app. Everything in it.

App Store Google Play

What the tune adds

+??hp

Pick your car and we’ll show the factory figures and what the calibration adds.

See your gain. Before you buy.

Type your car — we’ll show what Monte adds to its engine.

Prefer picking? Choose from the list

Monte GT$279

* “With Monte” figures are estimates calculated from manufacturer ratings, not measurements. Results vary by vehicle, engine condition, fuel, climate and driving; individual results may be lower.

Why results vary

Estimated from the factory figures for this engine — not a measurement of your car. Real-world gains may be less or more, depending on a large number of contributing factors: displacement, aspiration, fuel, altitude, the condition of the engine and how the car is driven.

Real Results from Real Drivers

Estimated Measured.

Every power figure here comes from a chassis dyno run you can watch or read. Where there was no dyno, we say so.

CarGainMeasured by
Ford F-150 Raptor Ford F-150 Raptor3.5 EcoBoost · 2019 · GT / GTR +21hp+31lb-ft SEMA GarageLab test · Diamond Bar, CA
Mercedes C300 Mercedes C3002.0 turbo · Monte GT / GTR +25.1hp+72.2lb-ft Car News · YouTubeDyno on video
Abarth 595 Abarth 5951.4 T-Jet · Monte GT / GTR +20.6hp+13.7lb-ft Abarth owner · UKDyno on video
Nissan 370Z Nissan 370Z3.7 V6 · 2014 · Monte GT / GTR +22.3hp+16.8lb-ft CircuiTek · New TaipeiDynocom customer dyno report
Mazda MX-5 Mazda MX-52.0 · Monte GT / GTR +16.6hp+17.1lb-ft CircuiTek · New TaipeiDynocom customer dyno report

Which tuning fits your car? Three ways, side by side.

Three ways to change how an engine responds — what each one involves, and what it costs you later.

Monte
ECU flash
Installation
Monte
Plugs into OBD-II. 5 min, no tools.
ECU flash
Shop rewrites the ECU. 1–3 h.Wired under the hood. 1–2 h.
Reversibility
Monte
Unplug. No ECU changes.
ECU flash
Re-flash to stock; counters may remain.Unplug and restore the wiring.
Power gain
Monte
Moderate. Dyno-tested — see Real Results.
ECU flash
Largest — the ECU map is rewritten.Moderate; mostly turbo engines.
Moves to your next car
Monte
Yes — set it up on your next compatible car.
ECU flash
No — one ECU, pay again.Rarely — model-specific harness.
Price
Monte
From $279. No labour.
ECU flash
$500–1,500 + labour, typical. Monte saves you $221–1,221.$300–900, typical. Monte saves you $21–621.

Five points buyers ask us about most — not every way to compare.
Flash and piggyback figures are typical market ranges, not our measurements, so the saving is the arithmetic on those ranges against the $279 Monte GT — not a quote. Monte figures come from dyno tests — see Real Results.

Real feedback from customers

≈20hp

Kia Stinger GT

“about 20 hp” · owner’s estimate

Noticeable

Amazon.ca buyer

“a little more get up and go”

5min

Amazon.ca buyer

“very simple to set up”

Shocked

1997 Mazda B2300

“Definitely gave it a boost”

Huge

Canada · Sport 2 mode

“the sport 2 mode is a lot of fun”

Results as reported by the owners. Experiences vary by vehicle, driving conditions, and selected mode.

“A gain of about 20 hp on a Kia Stinger GT.”

Translated from French

I tried this chip without any expectations. A gain of about 20 hp on a Kia Stinger GT. Power comes in faster, with a better kick on gear changes. I noticed the difference after about 50 km... I finished the 200 km on Race Max and I'm very satisfied. I recommend it.

Original: J'ai tenté l'essaie de cette chip, sans avoir aucune attente. Un gain d'environ 20hp pour un kia stinger gt. Puissance arrive plus vite et meilleur kick lors de changement de vitesse. J'ai remarqué la différence après environ 50 km... j'ai terminer les 200km à race max et très satisfait. Je recommande

R
Roxane
Amazon CanadaMay 31, 2024
“This tuning chip has made a very nice and definitely noticeable difference in the throttle response as well as top end before gear changes, plus an almost 40 more ponies to play with!!!!”

This tuning chip has made a very nice and definitely noticeable difference in the throttle response as well as top end before gear changes, plus an almost 40 more ponies to play with!!!! I would definitely recommend this if you’re looking for a little more get up and go at a reasonable price! I haven’t tried the gas saving feature yet so I’ll come back to you in a few months when the weather gets colder. I’m just enjoying the extra get up and go right now while the weather is nice. Setup was also very easy and went without a problem.

B
BigTim
Amazon CanadaAugust 26, 2025
“clear instructions to walk you through the 5 minute setup.”

this is a great product to add performance
 and most importantly increases your fuel milage. very simple to set up and calibrate. clear instructions to walk you through the 5 minute setup. they have a good customer service as well. i spoke with Eugene and he was very helpful.

S
Shaun
Amazon CanadaJuly 28, 2025
“Definitely shocked with the difference it made in the truck, used in my 1997 Mazda b2300.”

Definitely shocked with the difference it made in the truck, used in my 1997 Mazda b2300. Definitely gave it a boost

J
John
Amazon CanadaJune 21, 2025
“Noticed a huge improvement in acceleration, negligable increase in feel consumption.”

Halfway through the calibrating for Sport 2 mode, pretty satisfied so far. Noticed a huge improvement in acceleration, negligable increase in feel consumption. Haven't tried feel saver yet, good chance I may never try it as the sport 2 mode is a lot of fun and had way less negative impact on feul than I anticipated

P
Paul
CanadaJanuary 7, 2026
Installing Monte GTR car tuner device

Installs in minutes. Unplugs as easily.

The OBD-II port is under your dash. No tools, no wiring, no ECU flashing.

01
Plug Monte into the OBD-II port
02
Pick your car in the Monte app
03
Drive. Unplug any time to go back to stock

Works with OBD-II cars — US 1996 and newer, EU 2001 and newer.

Watch installation guide
Watch installation guide

Upgrade your driving. Monte GT.

Monte GT$279
$279
or 4 interest-free payments of $69.75 with

Subject to eligibility and approval. Payment options through Affirm are provided by these lending partners: affirm.com/lenders

Performance tuning
Fuel economy tuning
App Controlled

What’s in the box?

Monte GT · OBD2 cable · Installation manual · Magnet mount · Aluminum GT car badge

Calibrated for your engine · 30-day returns · Limited lifetime warranty

Tech specs

PerformanceUp to 20% more power on turbocharged engines*Up to 12% more power on naturally aspirated engines*Economy modes for steady, relaxed driving
TuningCalibration for your exact engine, up to 256 load pointsWorks in temporary memory — the permanent memory is never written
ModesSix modes, from Race II to Economy II120-mile adjustment in each mode
Connection16-pin OBD-II connectorBluetooth to your phone
SoftwareMonte 2.2 firmwareFree iOS and Android appTuning database for your exact vehicle
HardwareOperating temperature: −40 to +85 °C (−40 to +185 °F)Operating voltage: 7.5–20 VRadio: 2402–2480 MHz, 0.59 mW
Warranty30-day money-back guaranteeLimited lifetime warranty on defects
Dimensions78 × 55 × 18 mm3.1 × 2.2 × 0.7 in
What’s in the box?
Monte GT
OBD2 cable
Installation manual
Magnet mount
Aluminum GT car badge

*Real-world results may be less or more.

Why results vary

It depends on:

  • Engine size
  • Turbocharged or naturally aspirated
  • Fuel quality
  • Altitude
  • Engine condition
  • How the car is driven
Want it on a screen? Monte GTR · $399 →

Buy with confidence. We’ve got you covered.

Free shipping. Worldwide from Little Rock, Arkansas.

30 days to try it. Not the right fit? Full refund.

Limited lifetime warranty. Manufacturing defects, for the original buyer.

Frequently asked questions

Check the catalogue: make, model, year and engine. Monte GT works on cars with an OBD-II port — in the US from 1996, in Europe from 2001 — but each engine needs its own setting, so not every car is listed yet. Browse supported cars →
A calibration made for your exact engine and year, at up to 256 load points, in the engine’s temporary memory. It never writes to the permanent memory. It plugs into the OBD-II port, and you control it from the Monte app over Bluetooth.
It depends on the engine. Up to 20% on turbocharged engines, up to 12% on naturally aspirated ones and up to 10% on hybrids — measured against the combined output of engine and battery, because a tune works on the combustion engine only. Real-world results may be less or more: engine size, fuel quality, altitude, engine condition and how the car is driven all play a part.
Not directly — the GT does not change how the pedal is read. It changes the engine’s calibration, and the extra torque is what makes the car feel quicker to respond.
Yes. A throttle controller only changes how the pedal is read; Monte GT tunes the engine itself. They work on different systems, so they can be used together.
Yes. Monte GT works with gasoline and diesel engines, including turbo-diesels, and with many hybrids. Check your exact engine in the catalogue before you buy. Browse supported cars →
Yes. The GT changes the engine’s calibration and nothing in the gearbox, so it works with manual, automatic, dual-clutch (DSG) and CVT transmissions alike.
The Economy modes are made for steady, relaxed driving. How much fuel they save depends on the car and how it’s driven — we don’t quote a figure until we’ve measured it.
No. Use the fuel grade your manufacturer specifies. Higher octane may help a little in the performance modes, but it is not required.
Race II, Race, Mix, Stock, Economy and Economy II. Race II gives the most performance and no fuel saving, Economy II the most fuel saving and no extra performance, Mix sits in between, and Stock is factory behaviour. Each is its own tune, not one setting turned up and down. Change mode in the app with the car at a standstill.
In each mode the GT spends the first 120 miles (200 km) reading your engine before it applies that mode in full. Drive normally — several short trips count. You may not feel much at first; that is the adjustment still running. Switch to another mode and its own 120 miles begin.
The GT works in the engine’s temporary memory and never writes to the permanent one, and the factory safeguards stay active. Like any tune, the performance modes add load — use them as intended, and keep the fuel grade and service schedule your manufacturer specifies.
No — installing an aftermarket part doesn’t void your car’s warranty by itself; that’s US federal law (the Magnuson-Moss Warranty Act). Monte doesn’t rewrite the factory software, and unplugging it puts the car back on its factory settings. Warranty repairs are always the dealer’s decision.
The car is back to its factory settings immediately. There is nothing to undo and nothing to reset. Plug it back in and your mode is there again, with whatever adjustment it had already done.
Everything the GT does, it does through the Monte app — there is no screen on the device and nothing to press. In the app you choose your car and a mode, and watch speed, average and top speed and drive time on the gauges screen. iPhone and Android: montetuning.com/gtapps. You need an account to keep your car and your modes.
The app is free. You do need a phone: the GT has no screen and no buttons, so your car and your mode are set in the app. Once they are set, the GT carries on without the phone.
The GT stays plugged in — that is how it keeps working. The app does not: once the mode is set, close it and the GT carries on by itself. Parked, the GT goes to sleep and blinks red once every five seconds; it wakes when you start the car.
It is not meant to. Parked, the GT goes to sleep — the lamp blinks red once every five seconds — and wakes when you start the car.
It takes a few minutes. Plug the cable into the OBD-II port — on its own, never through a splitter — and set the GT on the magnet mount. Get the Monte app, create an account, pair over Bluetooth with the engine running, then choose your car and a mode.
The engine has to be running. Check that Bluetooth is on and that no other phone is already paired with the GT. While it pairs, the lamps flash blue.
Yes. Unplug it, plug it into the other car, choose that car in the app and let the mode run its 120 miles. Selling the car? Take the GT with you.
Tell us the make, model, year and engine. We build the setting for it, normally within three business days, and the catalogue in the app updates itself — you do not need a new device.
Unplug the GT. If the light goes out, tell us the car, the mode, what the lamps are doing and roughly how many miles since you set it. If the light stays with the GT unplugged, it is the car, and it wants looking at either way.
No. Monte tunes the engine and switches between its own modes — nothing else. It doesn’t remove the top-speed limiter, doesn’t turn off stability control, traction control, ABS or other safety systems, and doesn’t change lighting, tire size or speedometer calibration.

Does Monte fit your car? Check by make and model.

Pick your car and the answer comes straight from the calibration list — no form, no waiting for a reply.

Prefer picking? Choose from the list

Monte Tuning female technical support specialistMonte Tuning male technical support specialist
Need help choosing?
Average response time: within 2 hours