Is Monte Tuning legit? Monte GT and Monte GTR tuner reviews: a lab test, dyno runs and owners in their own words — with the source next to every figure.
Dyno test, not stock footage · Mercedes C300 · Car News
Monte GT and GTR tuner reviews. What owners say.
Buyers’ reviews and Monte Tuning reviews on Reddit, word for word.
≈20hp
Kia Stinger GT
“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 Canada·May 2024
Mid-range
2018 Silverado 5.3
“Truck feels smoother overall and pulls better in the mid-range, especially when passing or getting up to speed. I did see some improvement in my 0–60 times.”
“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 Canada·Jun 2025
Noticeable
Amazon.ca buyer
“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 Canada·Aug 2025
Huge
Canada · Sport 2 mode
“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
Canada·Jan 2026
For real
Lexus
“Nope monte tuning is for real, I have it on my Lexus definitely makes a difference”
“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 Canada·Jul 2025
Results as reported by the owners. Experiences vary by vehicle, driving conditions, and selected mode. Reddit quotes are word for word, each linked to its comment.
SEMA Garage · Diamond Bar, CA
Monte dyno test at an independent lab. +21 hp, same truck, before and after.
An independent dyno lab tested Monte on a 2019 Ford F-150 Raptor 3.5 EcoBoost: baseline first, then with Monte.
Gain
+21 hp and +31 lb-ft, both 8%, at 51 mph
Method
Fifth gear, Race II mode, each curve the average of three separate runs
ECU software
Calibration ID and checksum identical before and after — nothing was flashed
Fault codes
None; check-engine light off; all readiness monitors complete
A mechanic with no ties to us
“
It does not overwrite any software in the vehicle’s ECM
EEricAutomotive repair shop manager, answering a buyer’s question on JustAnswer
Your factory software stays exactly as it was — unplug Monte and the car is back to stock.
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 Raptor3.5 EcoBoost · 2019 · GT / GTR+21hp+31lb-ftSEMA GarageLab test · Diamond Bar, CA
Measured result
Ford F-150 Raptor
3.5 EcoBoost · 2019 · GT / GTR
SEMA Garage
Race II, fifth gear, each trace the average of three separate dyno runs. Best gain 21 hp and 31 lb-ft, both 8%, at 51 mph. Measured at SEMA Garage, September 2023.
Ford Taurus3.5 EcoBoost · GT / GTR18→22mpgCity · owner’s estimateTaurus owner · USOwner video · no dyno
Owner video
Ford Taurus
3.5 EcoBoost · GT / GTR
Taurus owner · US
This owner filmed his own Monte GT review on the road — a drive, not a dyno run. He reports his city average went from about 18 to about 22 mpg. His own figures, not a measured test.
Nissan 370Z3.7 V6 · 2014 · Monte GT / GTR+22.3hp+16.8lb-ftCircuiTek · New TaipeiDynocom customer dyno report
Measured result
Nissan 370Z
3.7 V6 · 2014 · Monte GT / GTR
CircuiTek · New Taipei
325.6 → 347.9 hp, stock and fitted back to back on the same dyno. The car runs an aftermarket exhaust (mid and rear section). Our own test.
Mercedes C3002.0 turbo · Monte GT / GTR+25.1hp+72.2lb-ftCar News · YouTubeDyno on video
Measured result
Mercedes C300
2.0 turbo · Monte GT / GTR
Car News · YouTube
Filmed before and after on the same dyno
Abarth 5951.4 T-Jet · Monte GT / GTR+20.6hp+13.7lb-ftAbarth owner · UKDyno on video
Measured result
Abarth 595
1.4 T-Jet · Monte GT / GTR
Abarth owner · UK
Two runs in one session on a certified insoric system — stock first, then with Monte. August 3, 2020, 63 °F, 28.6 inHg, third gear, corrected to ECE 80/1269.
Mazda MX-52.0 · Monte GT / GTR+16.6hp+17.1lb-ftCircuiTek · New TaipeiDynocom customer dyno report
Measured result
Mazda MX-5
2.0 · Monte GT / GTR
CircuiTek · New Taipei
Best gain, both 11.8%, at 5100 rpm: 140.5 → 157.1 hp and 144.7 → 161.8 lb-ft. Peak to peak the same run reads 156.2 → 163.4 hp. Corrected to SAE J1349.
Do performance chips work? Real ECU tuning does.
Three things sold as “more power” — what each one changes, and what a dyno shows.
Monte
$20 chip
What it changes
Monte
Fuel and ignition calibration. Inside the ranges your ECU already allows.
$20 chip
A sensor signal. It fools the ECU; the calibration stays the same.Pedal sensitivity. The engine makes the same power.
Power on a dyno
Monte
Measured. +21 hp at an independent lab, the same truck before and after.
$20 chip
Little to none. Look for a dyno run with a source — you rarely find one.None. It feels quicker, peak power stays where it was.
Made for your engine
Monte
Yes. A calibration for each engine: year, make, model, engine.
$20 chip
No. One box “fits every car”.No. Matched to the pedal plug, not the engine.
Check-engine light
Monte
None in the lab test. All readiness monitors complete.
$20 chip
Common. A faked sensor reading can set codes.Usually none. It only rescales the pedal signal.
Back to stock
Monte
Unplug it. Nothing is rewritten.
$20 chip
Unplug it.Unplug it.
“$20 chip” and “throttle controller” are kinds of product, not one brand. This is how each kind works. Our figure is the SEMA Garage lab test above.
Your car, your call. Here are the pros and the cons.
We’d rather you buy knowing the limits than return it disappointed. Try it on your own car — and tell us how it went, good or bad. We read every message.
Why people choose Monte
Real ECU tuning with a measured gain — not a sensor trick.
Plugs in in about 5 minutes, unplugs back to stock.
Moves to your next compatible car.
GTR adds its own screen: live gauges, code reader, acceleration timer.
Where it’s not the best choice
Chasing maximum power? A full ECU flash tune gives more.
Want to change shift points or transmission behaviour? Monte doesn’t.
Your engine isn’t in our catalog yet? Ask us before you buy.
Try it. If you don’t feel it, send it back.
Back to stock in seconds — just unplug it. A full refund within 30 days of delivery, with a prepaid label inside the US. Lifetime warranty against manufacturing defects.
After you buy, everything is in your account
Sign in with a link by email — no password.
Track your order
Software and apps
Return in one click
Warranty claim in one click
montetuning.com/account
Example order · Monte GTR
On its way
Calibrated for the 2019 F-150 Raptor · UPS usually delivers in 2–4 days
PaidCalibratedOn its wayDelivered
Track on UPS →
GTR ProgrammerSwitch it to another car
WarrantyCovered for life
Return30 days from delivery
Your account · example order
Is Monte legit? Questions sceptics ask
Yes. Monte is a US company in Little Rock, Arkansas, making plug-in ECU tuners since 2018. The power gain was measured by an independent lab — +21 hp and +31 lb-ft on a Ford F-150 Raptor at SEMA Garage — and if you don’t feel a difference, you can return it within 30 days for a full refund.
If your engine is on our list and you want more power without a flash tune, judge by the owners on Reddit and YouTube above and by the dyno runs with their sources. Monte GT is controlled from your phone; Monte GTR adds its own screen with live gauges, a code reader and an acceleration timer. Both carry the same calibration, and both have 30 days to return.
Cheap “performance chips” — resistor boxes that fool a sensor — don’t: they add no measurable power. A real plug-in tuner works with the ECU’s fuel and ignition calibration, and a dyno shows it. That is why every figure on this page comes with who measured it.
Ask three questions before you buy. Does it ask for your engine? Real tuning needs a calibration for each engine — a box that “fits every car” changes nothing; Monte asks for the year, make, model and engine. Is there a dyno run with a source? Stock and tuned on the same car and the same dyno, with who measured it; this page has 5 cars, each run with its source, including an independent lab test. Can you send it back? A seller who believes in it gives a real return window; Monte has 30 days, and the return starts with one click in your account.
A $20 chip is not: it fools a sensor and adds no measurable power. A real plug-in tuner can be — if your engine is supported and you want more power without a flash tune. Judge it by a dyno run with a source, and buy where you can send it back: Monte has 30 days for a full refund.
We are not aware of a Consumer Reports review of Monte. What you can check instead is on this page: an independent lab test at SEMA Garage, every dyno run with who measured it, and owners on Reddit and YouTube in their own words.
A real one does: it works with the fuel and ignition calibration inside your ECU. A resistor “chip” that fools a sensor does not. The dyno runs on this page show stock and Monte on the same car, with who measured each one.
A throttle controller makes the pedal feel quicker, but the engine makes the same power — a dyno shows no gain. The runs on this page are on a dyno: the same car, stock first and then with Monte, and the power curve itself goes up. Monte does not change the pedal map; it works with fuel and ignition timing.
It depends on the engine. Up to about 20% on turbocharged engines and up to about 12% on naturally aspirated ones — the strongest results we have seen, not a promise for your car. Your car’s page shows our estimate for its engine.
No. Each engine needs its own calibration, so not every car is supported yet. Pick your year, make, model and engine: if yours isn’t on the list, we tell you so — we don’t sell a box “for all cars”. If you’re not sure, ask us before you buy.
Monte stays inside the ranges your factory ECU already allows and leaves its protections on. In the SEMA Garage test no fault codes were set and the ECU software was identical before and after. Unplug it and the car is stock again.
Right after install the ECU is still adapting its fuel trims and timing — that takes about 120 miles of normal driving, over several trips. If the car still hesitates after that, unplug Monte: the car is stock again at once. Then write to us and we will check the calibration for your engine, or refund you within 30 days.
Send it back within 30 days of delivery for a full refund — with a prepaid label inside the US. Give the ECU about 120 miles of normal driving first: that is when the full gain is in.
