Up to about +110 hp on Stage 2 (estimated), bangs on every upshift and quicker shifts. Engine and gearbox, one £300 licence.
Shown: M140i. Every car we support
Pick a stage and watch the numbers.
Maps for 98 and 95 RON. Gain estimates are for 98 RON.
Your build
+80 to 110 hp
About 415 to 445 hp on an M140i with a downpipe. Estimated, 98 RON.
Quiet when you start it, loud when you want it.
Overrun burble, the pops when you lift off, arrives as a free update.
Your build
+80 to 110 hp
About 415 to 445 hp on an M140i with a downpipe. Estimated, 98 RON.
ZF 8-speed. Quicker shifts, launch control, the lot.
Your build
+80 to 110 hp
About 415 to 445 hp on an M140i with a downpipe. Estimated, 98 RON.
Read your car free See what is on it before you pay
Full backup first Back to stock any time
Checksums handled Every write verified
Pay once Nothing to renew
Describe the car you want. Hellflash AI picks the settings, shows every change against stock, and you build and flash it.
Preview. Hellflash AI is rolling out to every licence holder as a free update.
Pops on upshift, but a quiet start.
Here’s what I changed:
Overrun burble lands as a free update. I’ll add it the day it does.
Engine apps leave the gearbox on factory settings. Gearbox apps leave the engine stock. Hellflash tunes both, on one licence.
| Engine-only app | Gearbox-only app | Hellflash | |
|---|---|---|---|
| Stage maps and engine sound | |||
| Gearbox shifts and launch | |||
| Licences to buy | 1 | 1 | 1 for both |
Each stage tunes the engine, the gearbox and the pops together, and you flash it yourself.
Every stage comes for 95 or 98 RON. Estimates are for 98 RON on the B58 and are not dyno results; your car may differ.
Try it in the appSearch your model. The app also reads your car and confirms before you pay.
Not listed yet. Email support@hellflash.com with your model and year and we will tell you where it is on the list.
MG1CS003 engine computer
M140i F20, F21
M240i F22, F23
340i F30, F31, F34 GT
440i F32, F33, F36
540i G30, G31 (early)
640i GT G32 (early)
740i G11, G12 (early)
X3 M40i G01 (early)
X4 M40i G02 (early)M140i auto F20, F21M240i auto F22, F23340i auto F30, F31, F34440i auto F32, F33, F36M135i, M235i auto F20, F22335i, 435i auto F30, F32
M340i G20, G21
M440i G22, G23, G26
M240i G42
Z4 M40i G29
X5, X6, X7 40i G05, G06, G07
840i G14, G15, G16
Toyota GR Supra 3.0 A90
M3 G80, G81
M4 G82, G83
M2 G87
X3 M F97
X4 M F98M135i F20, F21M235i F22, F23
M2 F87, 2016 to 2018335i F30, F31, F34435i F32, F33, F36
535i, 640i F10, F11, F06, F12, F13
X3 35i, X4 35i, X4 M40i F25, F26
X5 35i, X6 35i F15, F16
135i, 335i E82, E88, E90, E92, E93
135i E82, E88
1M E82335i, 335is E90, E92, E93
535i E60, E61
Z4 35i, 35is E89
X6 35i E71You do it yourself on your own drive, with a laptop and one cable.
An ENET cable from the OBD port to your laptop. Ignition on, engine off.
It finds the engine and gearbox computers and saves a full backup. Free.
A stage, a few plain choices, or the full editor. Every change shown against stock.
Checksums corrected and every write verified. Back to stock any time.
This is the real app. Pick a stage and flick a few switches, or go as deep as you like.
34 ZF 8HP settings you can build and flash. The ones people ask for most:
Gearbox software varies by car. The app reads yours and shows which settings it supports.
Arriving as free updates: flex fuel, four-slot map switching, launch control and anti-lag on the engine, no-lift shift, a higher boost ceiling, boost by gear, torque limiter removal and overrun burble.
Most tools sell the engine and the gearbox as two licences. Hellflash is one payment for both, with updates for that car and nothing to renew. Pay on Stripe's secure page and it switches on straight away.
Anything else, email support@hellflash.com
Yes. The F20 and F21 M140i (B58, MG1CS003 engine computer, 2016 to 2019) is the car Hellflash was built on, along with the M240i, 340i and 440i on the same engine. With the 8-speed automatic you get the gearbox tuning as well.
Yes. Plug a standard ENET cable into the OBD port, open the app on a Windows laptop, read your car, pick a stage or build your own, and flash it. The app saves a full backup first and corrects the checksums for you.
Yes. Hellflash flashes the engine and the gearbox from the same app, with a full backup first and checksums corrected on every write. Engine flashing works today on the B58 (MG1CS003): M140i, M240i, 340i, 440i and the early G-series 40i cars.
Yes. Pops on upshift come from the gearbox and you choose Off, Subtle, Nice or Loud. You also get a quiet cold start for early mornings and an exhaust flap that opens sooner. Overrun burble from the engine arrives as a free update.
Yes. Shift points for Drive, Sport and Manual, shift speed, upshift torque cut, torque limit per gear, launch control, drag mode, throttle blips on downshifts and more: 34 settings in all. Gearbox flashing is proven on a real car.
A tuner you talk to. Tell it what you want in your own words and it picks the settings, shows you every change against stock, and you build and flash it. It is rolling out to every licence holder as a free update.
Yes. bootmod3 and MHD tune the engine and xHP tunes the gearbox. Hellflash does both in one app on one £300 licence. They support more cars and have phone apps today; Hellflash runs on a Windows laptop for now, with phone apps on the way.
Flex fuel, map switching, launch control and anti-lag on the engine, no-lift shift and overrun burble are on the way. They need extra code on the engine computer, and they arrive as free updates for your car.
A standard ENET cable (OBD to Ethernet), a Windows laptop and a battery charger on the car while you flash. iPhone and Android apps are on the way.
Yes. Hellflash reads and saves your car's own software before the first flash, so you can put it back.
Yes. Load your car's own read or a backup as the starting point and edit on top of it, or start from stock.
£300, one time, per car. It covers the engine and the gearbox, with updates for that car. No subscription and no credits.
Remapping is legal, but you must tell your insurer, the car still has to pass its MOT, and some features, like a raised speed limiter, are for track use only.
It can. Tuning may affect your warranty, your insurance and whether the car is road legal where you live. Tell your insurer and keep your stock backup.
Read your car for free first. If it fits, it’s £300 once and it’s yours.
