AM General tuner and ECU tuning. 1 model, 1996–2001.
Monte plugs into the OBD-II port. Pick your model to see the engines and years we calibrate.
Every AM General we calibrate.
No model here by that name. Tell us the car and we will check the calibration list by hand.
Each model page lists the engines and years, with the calculator for your exact engine.
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
* “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.
Plug-in ECU tuning. No permanent flash.
Car manufacturers often use restrained tuning settings for your engine. Monte unlocks what’s already there.
More power and efficiency.
Installs in minutes. Unplugs as easily.
No tools, no wiring, no ECU flashing. Pull it out and the car is exactly as it left the factory.
Works with OBD-II cars — US 1996 and newer, EU 2001 and newer.
TunedStock
Responsive power. Right when you need it.
Stronger mid-range for merging onto the highway.
That light. Now it has a name.
Monte GTR reads Check Engine codes, tells you what they mean and clears them — right on its screen. No separate scanner needed.
Built into Monte GTR
Measure any mod. Get the slip.
Tires, intake, a tune — run it, change it, run it again.
See how it works
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.
Ford F-150 Raptor3.5 EcoBoost · 2019 · GT / GTR
+21hp+31lb-ft
SEMA GarageLab test · Diamond Bar, CA
Ford F-150 Raptor
3.5 EcoBoost · 2019 · GT / GTR
SEMA GarageRace 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.
Mercedes C3002.0 turbo · Monte GT / GTR
+25.1hp+72.2lb-ft
Car News · YouTubeDyno on video
Mercedes C300
2.0 turbo · Monte GT / GTR
Car News · YouTubeFilmed before and after on the same dyno
Abarth 5951.4 T-Jet · Monte GT / GTR
+20.6hp+13.7lb-ft
Abarth owner · UKDyno on video
Abarth 595
1.4 T-Jet · Monte GT / GTR
Abarth owner · UKTwo 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.
Nissan 370Z3.7 V6 · 2014 · Monte GT / GTR
+22.3hp+16.8lb-ft
CircuiTek · New TaipeiDynocom customer dyno report
Nissan 370Z
3.7 V6 · 2014 · Monte GT / GTR
CircuiTek · New Taipei325.6 → 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.
Mazda MX-52.0 · Monte GT / GTR
+16.6hp+17.1lb-ft
CircuiTek · New TaipeiDynocom customer dyno report
Mazda MX-5
2.0 · Monte GT / GTR
CircuiTek · New TaipeiBest 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.
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.
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
Kia Stinger GT
“about 20 hp” · owner’s estimate
Amazon.ca buyer
“a little more get up and go”
Amazon.ca buyer
“very simple to set up”
1997 Mazda B2300
“Definitely gave it a boost”
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
“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.
“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.
“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
“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
Designed in the USA · Ships from Little Rock, Arkansas
Choose the right Monte car tuner for your AM General drive
Monte GTR
Tuning, diagnostics and testing on one screen.
Monte GT
Everyday tuning, controlled from your phone.
Subject to eligibility and approval. Payment options through Affirm are provided by these lending partners: affirm.com/lenders
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
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
Your is on the list.
The calibration is already written — it goes into the device before it ships.
