EGO-X exhaust system Audi RS4/RS5 B9 quattro 450 hp OPF (with ECE*)

Tailpipes are not included. The exhaust is supplied only together with tailpipes — add one of these to the basket:

• Bull-X tailpipe tip set: type 22 Stainless steel oval 170×110 (C:1x64mm + 1x76mm) (HGERO170112-RS45)
• Bull-X tailpipe tip set: type 22 Stainless steel oval 170×110 (C:1x64mm + 1x76mm) (HGERO170112-B-RS45)

EGO-X 76 mm exhaust system for Audi RS4 / RS5 B9 OPF – valved exhaust with electric valve control

The newly developed EGO-X exhaust system for Audi RS4 and RS5 B9 models with OPF sets new standards in terms of flow, sound and performance. Compared with the previous generation, the system has been comprehensively reworked and consistently designed for maximum flow and modern valve technology.

A key highlight is the fully continuous 76 mm (3 inch) piping, which starts at the standard Y-pipes and replaces the OEM front silencers. Compared with the standard system, this significantly reduces exhaust back pressure, improves throttle response and creates optimal conditions for powerful setups.

76 mm full-flow concept for maximum performance

The continuous 3 inch design ensures a particularly high exhaust gas flow and noticeably relieves the turbochargers – ideal both for standard vehicles and for performance-tuned applications.

The tailpipe connection has also been implemented without compromise:
Every tailpipe connection has a 76 mm connection diameter, so the high flow is consistently maintained right to the rear. No constrictions, no unnecessary bottlenecks – a true full-flow design (with the valve open).

New electric valve control

Another highlight of the new development is the switch to electric exhaust valves.
This modern solution allows precise valve control and combines a sporty sound with everyday usability at the highest level.

Combined with the typical EGO-X sound character, the result is a powerful, deep sound with a motorsport-like presence – with no compromises in quality or workmanship.

Like all EGO-X systems, this system is also hand-made using TIG welding and is made from high-quality stainless steel with elaborately manufactured absorption silencers , for maximum durability and optimal gas flow.

Technical details

• Continuous 76 mm / 3 inch pipe diameter
• the standard front silencers are omitted completely
• 76 mm tailpipe connections (both sides)
• Electric valve control
• High-quality stainless steel construction
• Hand-made absorption silencers
• TIG-welded
• From the OPF back

Scope of delivery

• EGO-X exhaust system from the OPF back
• Electric valve control
• Tailpipes (optionally available)
• Fitting material
• Fitting instructions

Your benefits at a glance

✔ Continuous 76 mm full-flow design
✔ Significantly reduced exhaust back pressure
✔ Electric valve control
✔ Noticeably more sound, flow and performance
✔ Hand-made stainless steel quality
✔ Perfect for standard and performance-tuned vehicles

EGO-X – developed for drivers who make no compromises.

With ECE type approval*:
*Applies only to the following selection in the “Operating mode selection” field: Bull-X Tronic control unit (with ECE type approval)

This flap exhaust system has ECE approval, so it can be driven on public roads without being entered in your vehicle documents.
Please note: exhaust systems with ECE approval are not affected by the “flap ban” and may still be used on public roads in full compliance with the law.

While driving you can choose whether to drive in Comfort or Sport mode. If your vehicle has a drive mode selection, control via that selection is also possible.
For vehicles without a drive mode selection, control can be carried out with the supplied button. Its LED lighting shows you whether the flap is currently open (light off) or closed (light on).
The control unit closes the flap automatically in all ranges required by the ECE regulation, regardless of which mode you are driving in.

In general the Bull-X Tronic offers two control modes:
– Sport (Dynamic, Race): within the approved scope of the ECE regulation the flap is always open. When stationary the flap is always closed.
– Comfort mode: the flap is always closed, but within the approved scope of the ECE regulation it opens while driving from 75% throttle opening.

You can find further information in our info video.

Without ECE type approval*:
*Applies to the following 3 options in the “Operating mode selection” field: exhaust flap control via switch / exhaust flap control via remote control / Bull-X Tronic “Race” CAN bus control unit

If the vehicle has a drive mode selection (sport button), control via that selection is also possible.
For vehicles without a drive mode selection, control can be carried out with the supplied button.
The button’s LED lighting indicates whether the flap is currently open (light off) or closed (light on).

If you have also purchased the Bull-X Tronic control unit, it is still possible to open the flap when stationary, but while driving the control unit regulates the exhaust flap in line with ECE guidelines.

In general the Bull-X Tronic offers two control modes:
– Sport (Dynamic, Race)
– Comfort mode (flap opens from 75% throttle position)

The “without ECE type approval” version is not permitted for use on public roads – for racing use only!

ATTENTION! The exhaust system offered is not permitted for road use! With the ECE Bull-X Tronic control and the EC catalytic converter you may legally drive your vehicle on public roads. The use of all other controls and/or catalytic converters is intended for racing purposes only. If, despite our warning, you fit an exhaust system WITHOUT ECE approval, you commit a criminal offence. Possible consequences include: the operating licence becoming invalid, the vehicle being taken off the road, a report for tax evasion, and possible investigations by the environmental authority.