This EGO-X exhaust system for the BMW M3 and M4 is hand-built using TIG welding and features absorption silencers without chambers. The pipe diameter is 2.75 inches (70 mm).
Technical details
- Pipe diameter: 2.75″ (70 mm)
- Pipe material: stainless steel
- Absorption silencers: hand-built
- Configuration: cat-back
- Welding: TIG
Contents of delivery
- Cat-back exhaust system
- Wiring material for connection to the vehicle electronics
- Vacuum hose for connecting the Bull-X Tronic controller to the exhaust valve
- Exhaust tips (available separately)
- Fitting instructions
- Fitting hardware
- Bull-X Tronic control unit (when selecting the ECE-approved version)
Exhaust valve control
If the vehicle has selectable driving profiles, the valve can be controlled via this function. On vehicles without selectable driving profiles, control is possible using the supplied button. The button’s LED indicates the valve status: the light is off when the valve is open and on when it is closed.
The Bull-X Tronic controller provides two operating modes:
- Sport (Dynamic, Race): the valve remains open while driving within the ECE-approved operating range and is always closed when stationary.
- Comfort: the valve remains closed and opens while driving within the ECE-approved operating range at 75% throttle opening.
Road use: ECE approval applies only when the Bull-X Tronic control unit with ECE approval is selected and an EG catalytic converter is used. All other control options and catalytic converters are intended exclusively for track use.
Suitable for: BMW 4 I (F32/F33/F36/F82/F83), BMW M3 VI (F30/F31/F34/F80).
Manufacturer’s vehicle data
- EGO-X Abgasanlage 2,75″ BMW M3 F80, M4 F82 inkl. Competition 431/450PS (mit ECE*)
Original product name by HG Motorsport (»z.B.« = e.g.). Please check model, year and engine of your vehicle before ordering; if in doubt, contact us and we will check for you.
Approval
Only the version marked “road legal” has a European ECE / EC approval (Bull-X Tronic controller with ECE or the HJS EC catalytic converter). Versions marked “no ECE, track use only” have no approval and are not permitted for road use. If in doubt about the version, contact us and we will check for you.
Exhaust tips
This exhaust system requires exhaust tips, which are not included in the price. Choose them from the Bull-X tips in our shop and add them to your basket; if unsure which fit, contact us.

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