Maidstone, Kent

Stage 3 remapping in Maidstone

Name: JF Automotive
Address: Unit 31, Integra, Parkwood Industrial Estate, Bircholt Rd, Maidstone, Kent, ME15 9GQ, United Kingdom
Telephone: 01622 321500
Price range: $$-$$$

Custom tuning for serious builds: a bigger turbo, upgraded fuelling and a stronger engine and drivetrain, planned with you and tuned on our own 4WD rolling road.

Build your tune → Call 01622 321500

Planned car by car
Petrol and diesel builds
Tuned and proven on our dyno

Where Stage 3 fits

Stage 1, 2 or 3?

Software

Stage 1

Software only. The standard parts stay, and the ECU is tuned to get more from them.

Software + bolt-ons

Stage 2

Software plus breathing parts: intake, downpipe or exhaust and a bigger intercooler.

Hardware + custom tune

Stage 3

The turbo, fuel system and often the engine internals change, so the car can make far more power than standard parts could handle.

Petrol and diesel

What a Stage 3 build usually needs

Every car is different, so treat these as a starting point. We check what your engine needs before we quote.

Petrol

Hybrid or bigger turbo (or supercharger upgrade)
Higher-flow injectors and an uprated high-pressure fuel pump, plus a low-pressure pump on some cars
Bigger intercooler, intake and downpipe
Uprated coils and colder spark plugs
Forged pistons and rods on many engines
Clutch or gearbox upgrade to take the torque

Some petrol builds can run on E85 or a flex-fuel kit for extra power, if the fuel system is set up for it.

Diesel

Hybrid or bigger turbo
Larger injectors and an uprated high-pressure pump
Bigger intercooler and intake
Clutch and flywheel upgrade, often a solid flywheel conversion
Gearbox tune or upgrade for automatics
Exhaust and downpipe with the DPF kept in place for road use

Diesel builds make big torque, which is usually what limits the clutch and gearbox first. Road cars must keep their emissions equipment.

What Stage 3 means

When the standard parts become the limit

Every engine has a point where the standard turbo, injectors and pump can't supply any more air or fuel. Stage 1 and 2 work within that. Stage 3 moves the limit by changing those parts.

Because the hardware changes, a Stage 3 tune is written for your car and your parts, not taken off a shelf. We tune it on our 4WD rolling road with data logging, adjusting boost, fuelling and timing until it's right, then road test it.

It suits fast road cars, track cars and motorsport builds. It's not a quick upgrade: it takes planning, a realistic budget and some patience while parts are sourced.

When the standard parts become the limit

What else changes

The car around the engine

More power puts more load on everything else. A good Stage 3 build looks at the whole car, not just the engine.

Clutch and flywheel, or a gearbox tune and upgrade for automatics and DSGs
Brakes to match the extra speed
Cooling: intercooler, radiator and oil cooling for consistent power
Tyres and suspension that can put the power down
Insurance: tell your insurer about every modification

Budget guide

What a Stage 3 build costs

These are the starting prices in our tuning builder. Anything you already have fitted comes off, and you get one fixed price for your car once we know the engine and the goal.

Uprated intercooler or charge coolerFrom £700For turbo cars, to keep intake temperatures down at higher boost.

Performance exhaustFrom £2,200Sports cat. A de-cat is for off-road use only.

Induction kitFrom £150Lets the engine breathe more freely.

Hybrid or bigger turboFrom £1,600The part that moves the power limit.

Uprated fuel pump and injectorsFrom £600More fuel to match the extra air.

Stage 3 custom tune and dynoFrom £800Mapped for your parts and proven on our 4WD rolling road.

Together that is from £6,050, less anything you already have. Engine internals, a clutch or a gearbox upgrade are quoted on top if your power target needs them. Spread the cost with our finance options.

How it works

How a Stage 3 build works

Start in the builderEnter your registration, choose Stage 3 and tell us what is already fitted. We then talk through your power target and what it needs.
Plan and order partsWe agree the parts list and a fixed price, then source the parts.
Build, tune, proveWe fit the parts, write the tune on our dyno with data logging, and road test before the car goes home.

Start your build

Build your Stage 3 tune

Enter your registration in our tuning builder. It shows the stages for your car, asks what parts you already have fitted, and sends us everything we need to plan your build.

Open the tuning builder →Call 01622 321500

On our dyno

Cars we've tuned

Meet the team →

Reviews

What customers say

Excellent service. Great communication, and seers all my questions and the remap has made a big difference. Highly recommended! Will definitely use JFA again.

Joseph Forbes Adam

It was a great pleasure to meet these guys at JF automotive. {Maidstone} After asking the audience on social media who I should take my car to. Had the dyno and stage one remap. The results were great and got a print out of before and after test. These guys…

David Chapman Abarth 595 1.4T

It my scound car which I tuned with JFA. They done amazing job..again :) I done just 30 miles in my Mazda CX-5 but i can see hugh difference in acceleration. Thanks guys. Will be back with new car i am sure :)

Pawel Mazda

Common questions

What is Stage 3 tuning?

A custom tune for a car with major hardware upgrades, usually a bigger turbo, an upgraded fuel system and a stronger engine and drivetrain. It goes beyond what the standard parts can handle.

How much does Stage 3 cost?

The core parts and tune start from £6,050 in our tuning builder, less anything you already have fitted. Engine internals, a clutch or a gearbox upgrade are quoted on top where your power target needs them. You get a fixed price for your car before any work starts.

Is Stage 3 reliable?

It can be, when the build is planned properly: the right parts for the power, the drivetrain to take it, and a tune set up on the dyno with data logging. Cutting corners is what makes big-power cars unreliable.

Can I do Stage 3 on a diesel?

Yes. The diesel list above shows what a build usually needs, and torque is usually what limits the clutch and gearbox first. Road cars keep their DPF and emissions equipment.

Is a Stage 3 car road legal?

It can be, as long as the emissions equipment stays in place and the car passes its MOT.

How long does a Stage 3 build take?

It depends on parts. Once everything is in, the fitting and tuning usually take days rather than weeks. We give you a timescale when we quote.

Other services

Stage 1, 2 and 3 explained Figures for your car Finance options

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.