6CYL KIT: AC STAG QMAX Plus OBD, 2x R01 Red, W03 - 500HP

6 Cylinder Sequential LPG Conversion Front Kit: AC Stag Qbox Plus ECU with OBD connection with two AC Stag R01 250HP reducer (Red) and AC Stag W03 single injectors

Most powerful up to 500 BHP 6 cylinder autogas conversion kit on AC STAG QBOX Plus with OBD connection and petrol addition options equipped with two R01 Red 250HP reducer and W03 single mount injectors. One of the best LPG conversion offers for most demanding engines.

QMAX PLUS included in 500HP AC STAG kit is a modern and compact controller with an advanced features that allows to install autogas perfectly working LPG conversion in almost every petrol car.

QMAX PLUS is based on the proven controller of STAG-4 and STAG-300. Dedicated for up to 8 cylinders engines with port injection and power up to 500HP.

Kit contain:

• 8CYL AC STAG QMAX Plus ECU Controller with Wiring Loom
• 2x 250HP AC STAG R01 Reducer with 8mm IN/OUT Gas Valve mounting bracket and accessories
• 6x AC STAG W03 LPG CNG Single mount injectors with manifold nozzles and mounting accessories
• PS-04 Pressure Sensor
• Gas Level Sender
• Switch and Buzzer
• 2x 12mm IN/OUT Vapour Gas Filter
• Installation Accessories
• Set of manuals, instructions, warranty book and Software CD 

QMAX PLUS benefits:
•    auto-adaptation OBD,
•    innovative auto-adaptation ISA 3,
•    support for CAN and K-LINE according with OBD2/EOBD,
•    extended options for reading OBD with auto error canceller,
•    overlap when switching fuel.

32-bit procesor dedicated for automotive
The processor is designed and manufactured only for use in automobiles, features many characteristics flawless use.

Manufacturer’s 5 years guarantee
Security for many years
The longest warranty of product under the STAG, confirming the excellence of the controller.


Universal controller  with a choice of powerful system auto-adaptation.

1. The innovative system auto-adaptation ISA3
ISA 3 is an innovative approach to the auto-adaptation, which should be done after the actual time of gasoline injection with some parameters OBD.
ISA3 is:
• dedicated map correction  independent on the correction turns injection time,
• collection of accurate reference card petrol injection time, taking into account the temperature of the engine,
• recognition modes of closed and open loop in real time
• view the oxygen sensor  signal from OBD of the vehicle.

2. Auto-adaptation OBD
Auto-adaptation OBD guarantees gas injection, exactly suited to the operating conditions and engine load. Influence on the composition of the mixture not only has information about the time of injection of gasoline, but also the modification in accordance with correction current gasoline unit.

3. Automatic OBD error canceller
Automatic OBD error canceller provides deletion of selected malfunctions OBD, without the need of connecting external devices.