Milltek Sport BMW M3/M4 Resonated OPF/GPF Bypass Mid Section (G80/G81/G82/G83)

Milltek Sport BMW M3/M4 Resonated OPF/GPF Bypass Mid Section replaces the factory OPF filters to reduce back pressure and increase flow. In doing so, your G80 or G82 will see quicker throttle response and faster turbo spool. This results in improved low and mid-range torque without sacrificing top-end power. The OPF Bypass will also unlock greater tuning potential.

As this is a resonated Mid Section, the pipework features a single resonator that helps to make the exhaust noise slightly quieter for daily use. As a consequence of this, airflow is slightly more restricted than the non-resonated alternative.

Looking for maximum performance gains? See the non-resonated version of this OPF Bypass Mid Section here.

Designed and manufactured in the UK!

*Please note: This OPF delete is only compatible with the factory BMW exhaust system. It DOES NOT FIT the Milltek Axle Back Exhaust System for the G80 3 and G82 M4.

COMPONENTS

F5161 x2 - Adaptors to OE Exhaust System
MSBM358 - Left-hand OPF/GPF Bypass Pipe
MSBM359 - Right-hand OPF/GPF Bypass Pipe
MSBM360 - Centre Silencer (Resonator)
F7096 - Chassis Brace Plate

PRODUCT SPECIFICATION

- High-quality type-304 aircraft-grade stainless steel
- Precision, quality-controlled manufacture to ISO 9001 standards
- Substantial weight saving over original equipment exhaust systems
- Reduces back pressure
- Sharper throttle response
- Designed & manufactured in the UK

COMPATIBILITY

- BMW G80 M3 Saloon (2021+)
- BMW G80 M3 Competition Saloon (2021+)
- BMW G81 M3 Touring (2023+)
- BMW G81 M3 Competition Touring (2023+)
- BMW G82 M4 Coupe (2021+)
- BMW G82 M4 Competition Coupe (2021+)
- BMW G83 M4 Convertible (2021+)
- BMW G83 M4 Competition Convertible (2021+)
GPF-equipped models ONLY

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.