EGO-X 3.5″ exhaust system for BMW 135i/140i F20/F21 with ECE

EGO-X exhaust system for BMW F20/F21 135i/140i (3.5″ / 89 mm)

This EGO-X exhaust system was developed specifically for the BMW F20/F21 135i and 140i, combining uncompromising performance, quality and everyday usability. It is made from high-quality stainless-steel pipes with a diameter of 3.5″ (89 mm). The silencers use an absorption design without chambers. The system is handmade and precisely TIG welded.

Product benefits

• Maximum performance through the optimised 89 mm pipe diameter
• Significantly reduced exhaust back pressure for improved engine response
• Handmade TIG-welded construction for durability and precision
• Deep, sporty sound without intrusive droning frequencies
• Absorption silencers for a balanced sound character
• Robust stainless steel for corrosion resistance and long-term durability
• Suitable for both standard and performance-enhanced vehicles

• Pipe diameter: 3.5″ (89 mm)
• Pipe material: stainless steel
• Absorption silencers: handmade
• Configuration: cat-back
• Welding: TIG

Fitting notes

BMW 135i without OPF: An approximately 50 cm section of the OEM pipe with an oval flex section must be retained and cut. The connection diameter at this point is 83 mm. A complete 89 mm system from the downpipe is not feasible because the OEM design would require it to be reduced to 76 mm, creating an unwanted restriction. This OEM section is therefore retained to achieve the full performance potential.

Models with OPF: The petrol particulate filter (OPF) is located underneath the vehicle and permanently integrated into the OEM exhaust system. The system is separated behind the OPF, after which the EGO-X is fitted using an adapter pipe and clamp. In rare cases where the OEM pipes are ovalised, fitting with a clamp may not be possible; the adapter pipe must then be welded. The estimated work time is approximately 15–20 minutes.

Note: With some HJS downpipes, it may be necessary to make a minor adjustment to the connection angle to the exhaust system.

Scope of delivery

• Exhaust system from the catalytic converter backwards
• 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 version

Road use: ECE approval applies only to the version with the Bull-X Tronic control unit with ECE approval. Legal use on public roads also requires the combination with an EG catalytic converter. Versions controlled by a switch, remote control or the Bull-X Tronic “Race” Can-Bus control unit are intended exclusively for racing use.

Suitable for: BMW 1 II (F20/F21).

Manufacturer’s vehicle data

• EGO-X Abgasanlage 3,5″ BMW 135i/140i F20/F21 (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.