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Remap calculator · Maidstone, KentBuild yourperfect tune.
Real figures for your exact car. Build it. Send it. Get your personal quote.
No reg to hand?
01Your car
Start with your car
Every figure on this page is specific to your exact engine, so tell us the car first.
1 · MAKE
2 · MODEL
3 · GENERATION
4 · ENGINE
Start with your make. The next box unlocks as you go.
GEARBOX
How would you like to do this?
02Your stage
Graph shape is for reference only. Your peak figures are shown below and confirmed on our dyno.
0→0
BHP · POWER · +0
0→0
NM · TORQUE · +0
Seen higher figures elsewhere?
Noted. We’ll cover that in your quote.
Want more than Stage 1?
Above is what a Stage 1 tune gives your exact car. If you’d like to find out what other options, or a Stage 2, can do for your car, try the tuning builder.
03Your options Anything else you’d like a quote for?
04How we’ll tune it At ours, at a dealer, or at home
YOUR BUILDJF AUTOMOTIVE
CAR
STAGE
FITTING
Tap an option to add it.
No checkout here. Your quote is personal to your exact car. Same-day reply, usually.
GET MY QUOTE
Parts for your car
ⓘA selection from our online shop. We supply plenty more than we list. Ask us for anything and we’ll source it with your quote.
15
Years’ tuning
Established 2011. Now a team of 11+ specialists.
50k+
Vehicles tuned
Over 50,000 tuned, from daily drivers to full builds.
4.8
★★★★★
2,200+ verified customer reviews.
In-house AWD dyno
Before-and-after runs on our own 2000BHP AWD rolling road. You leave with the printout.
Nationwide
Maidstone HQ, JFA dealers near you, or tune at home. Klarna and finance available.
Stage 1, 2 & 3 tuning in Maidstone, Kent
Every remap we supply is built for your exact engine, not just your model, and proven on our in-house rolling road before you drive away. Enter your registration above to see the real power and torque figures for your car, then build the tune you want and send it to the workshop for a personal quote.
01
What is Stage 1 tuning?
Stage 1 is a remap of your engine’s standard software on an otherwise standard car. No hardware is needed, it’s usually done the same day, and it’s fully reversible. On most turbocharged petrol and diesel engines it transforms how the car drives: stronger mid-range, sharper throttle response and, on diesels, often better economy too.
SOFTWARE ONLYSAME-DAYFULLY REVERSIBLE
CHECK MY CAR ↑
02
What is Stage 2 tuning?
Stage 2 pairs a more aggressive calibration with hardware that lets the engine breathe: typically an uprated intercooler or charge cooler, a performance exhaust with a sports cat (de-cat is strictly off-road only), and an induction kit. Because the hardware varies by engine, we quote Stage 2 per car. Parts from around £400 and the custom tune with dyno time from £600.
TUNE + HARDWAREPARTS FROM £400TUNE & DYNO FROM £600
BUILD MY STAGE 2 ↑
03
What is Stage 3 tuning?
Stage 3 builds on the Stage 2 hardware with a hybrid or larger turbocharger, and on some engines uprated fuel pumps or injectors. It’s a build we plan around how you use the car, mapped from scratch and proven on the dyno. Talk to the workshop before committing. The right Stage 3 depends entirely on the engine and your goals.
PER-CAR BUILDTURBO FROM £1,000DYNO PROVEN
TALK STAGE 3 ↑
EC
Economy remaps for diesels
Not chasing power? Our economy calibrations for diesel engines prioritise fuel efficiency and drivability, trading peak output for MPG. Popular with high-mileage drivers, vans and fleets across Kent.
DIESEL ONLYMPG FOCUSVANS & FLEETS
ASK ABOUT ECONOMY ↑
Common questions
Yes, when it’s done properly. We write to sensible limits for your exact engine, keep factory safety strategies intact, and prove the result on our own rolling road under full load, checking air/fuel ratios, boost and timing rather than guessing. A well-mapped car should drive like a better version of itself, not a fragile one.
Manufacturer warranties generally don’t cover modified components, so if your car is under warranty it’s worth checking your terms first. Our tunes are fully reversible if you need to return to stock. For insurance, you must declare any tuning to your insurer. Plenty of insurers are fine with it; not declaring is what causes problems.
A Stage 1 remap is usually a few hours and often same-day. Stage 2 depends on the hardware being fitted. Stage 3 is planned per car. If you use one of our home tuning tools, we post the tool out and load your file remotely. No travel at all.
Yes. We keep your original file, so the car can be returned to its standard software whenever you want: before a dealer visit, a warranty claim, or a sale.
Absolutely. You can use one of our home tuning tools and we’ll load your file remotely, or we’ll match you with an approved JFA dealer near you. Choose your preference in step 4 above and we’ll sort the rest.
The calculator gives you an honest estimate of the gains for your exact engine, based on figures we’ve developed and proven on our own dyno. Your final gains are confirmed on the rolling road when we tune the car, so what you see here is a realistic starting point rather than a best-case headline.
Because a fair price depends on your exact engine, what hardware you already have, and how you use the car. Rather than a headline number that changes once we look properly, we quote your build specifically, usually the same day.
Get my quote
YOUR BUILD SO FAR
Remap my car: where to start
If you have been searching how to remap my car, the calculator above is the first step. Put your registration in and it pulls your exact engine from our vehicle database, then shows the Stage 1, Stage 2 and Stage 3 figures in bhp and torque - so you can see what a car remap is worth on your engine before you spend anything.
Use it as a remap check
A remap check is exactly that: what your engine makes now, what the software alone will give it, and what the hardware stages add on top. Run the numbers, and if the Stage 1 gain looks small, that is the honest answer for that engine and we will tell you the same in person.
Car remapping and engine remapping are the same job
People search for car remapping, engine remapping and ECU remapping and mean one thing: rewriting the engine control unit's calibration so the engine is allowed to make what it is capable of. Stage 1 is that on its own, on a standard car. Stage 2 and Stage 3 add the parts that let it breathe.
Stage 1 calculator or Stage 2 calculator, the data is the same
Whichever stage you pick, the figures come from the same dyno-developed database, per engine, in bhp and Nm. Switch between stages and the difference you see is the hardware, not a different set of numbers. Sessions on our own rolling road in Maidstone are how those figures were built - see the rolling road.
Meet the team
The team behind every job
Technicians, calibrators and the front desk, all in Maidstone. No call centre and no subcontracting - the person who books you in is the person you can ask about the job.
Newsletter
Offers on parts and tuning, first
A short email now and then: new vehicle support, parts deals, open days. Nothing daily.