Leib Engineering BASIC Exhaust Valve/Flap Controller for BMW F-Series & G-Series (CANbus) | Plug & Play Muffler/Silencer Bypass Valve Module | Steering Wheel Button Control | Quiet Cold Start | E1 Type-Approved, CE Marked | No Coding, Error-Free OEM Fit

Important: if you are running an OPF delete, you must choose the PRO version.

Leib Engineering BASIC Exhaust Flap Control Unit for BMW F and G Series

Unlock the sound and flow you want from your BMW at any time. This Leib Engineering BASIC exhaust flap control unit integrates with the vehicle’s network and lets you switch your factory valve actuators between three modes on demand: Open for maximum soundtrack and performance feel, Closed for neighbour friendly cold starts and long-distance comfort, and Series for standard factory behaviour. It keeps everything looking OEM, delivers clean integration with the car’s electronics, and requires no software coding.

We have installed and used this unit on our own cars and for many customers. The feedback is consistent: effortless control from the wheel buttons, quiet starts when needed, valves-open exhilaration whenever you want it, and fault-free operation. It is EU type-approved (E1) and CE marked, with tidy plug-in connectors for a clean, reversible fit.

What you get

• Three selectable modes: Open, Series, Closed
• Control via the OEM wheel buttons for a true factory feel
• Engine Auto Start-Stop memory available via the instrument cluster menu
• Memory function: a brief press of the RES button stores your preferred mode for the next ignition cycle
• Subtle confirmation in the cluster via indicator flash
• Type-approved with E1 and CE conformity
• No dashboard warnings, no fault codes stored
• Plug-in harness with OEM-style connectors, no coding or soldering required

Why enthusiasts choose this control unit

It delivers the sound you want without compromise. Enjoy valves-open tone for B-road blasts or track sessions, switch to closed for early morning starts, and return to Series mode for everyday driving. The module communicates on the vehicle data bus just like a factory component, so operation is smooth and reliable. Customers love the OEM-like button control, the quiet start capability, and the reassurance of error-free integration.

Installation and fitment

Plug-in install using factory-style connectors. Typical installation time is around 120 minutes. Clear, illustrated online instructions make the process straightforward and fully reversible.

Prefer professional fitting? Book installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

User notes

• Select modes using the multifunction wheel buttons
• Press RES briefly to store the current mode for the next start
• Confirmation appears as a turn signal flash in the cluster
• All features are adjustable via the instrument cluster menu

Important information

• No fault entries are created when using the module
• The unit automatically disables itself when a BMW diagnostic tester is connected
• To avoid overlapping functions, valve control is only active when cruise control and the speed limiter are OFF
• If using an OPF deleter, the PRO version must be used

Compatibility

Suitable for BMW F Series and G Series models equipped with factory exhaust valve flaps. Unsure about your exact model or build year? Contact us and we will be happy to help.

Why buy from MJ Modifications

• BMW performance specialists with hands-on expertise
• Tried, tested and loved by our team and our customers
• Professional installation available in Warwickshire. Email info@mjmodifications.co.uk for a quote

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