Milltek OPF Back Exhaust - BMW F91/F92 BMW M8 Coupe & Cabrio

QT Parts is a Finnish online store.

Our warehouse is located in Nokia, Finland.

You can collect your order directly from us if needed. Simply select “Pickup” at checkout.

Pay securely with multiple payment methods, including invoice and installment plans through Klarna.

The delivery time for products in stock is 1-5 business days. We ship worldwide.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch. International orders may be subject to VAT, import duties, and customs fees upon arrival in the destination country.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

The Milltek Sport Particulate Filter-back exhaust system is designed for the BMW 8 Series M8 and M8 Competition models with the powerful 4.4 Twin Turbo V8 (S63) engine and factory-fitted OPF/GPF particulate filter . In this solution, the section of the exhaust system after the particulate filter is replaced with a Milltek flow-optimized system, improving sound quality and exhaust gas flow while keeping the original particulate filter in place.

The Particulate Filter-back solution offers a sportier and more open sound and improved exhaust flow without compromising on daily drivability or power characteristics.

Rich and refined V8 sound

Milltek has designed this system specifically for the requirements of OPF/GPF models:

• Deeper and richer V8 sound at idle

• Lively and dynamic sound when accelerating

• Sporty but controlled sound even at high revs

• No annoying resonance or drone when driving on the road

The sound profile maintains the car's premium character but highlights the power and sportiness expected from the S63 engine.

Improved exhaust flow and response feel

Particulate Filter-back exhaust system:

• reduces exhaust back pressure after the particulate filter

• supports the engine's sensitive throttle response

• improves throttle and power delivery throughout the rev range

• Keeps other parts of the original emissions system intact

This design combines a refined sound experience and improved performance without eliminating the functionality of the entire emissions system.

Direct bolt-on installation

• to fit directly into the car's original mounting points

• to work seamlessly with the F91/F92 chassis, powertrain and drive control systems

• for installation without welding or permanent structural changes

OEM-level fit and finish ensure a clean and unobtrusive finish.

304L Aircraft Grade Stainless Steel

The system is made of top quality 304L grade stainless steel , which offers:

• excellent corrosion and heat resistance

• long service life even with intensive driving

• flow-optimized internal design

• carefully finished TIG welds

The material and construction meet the high premium quality standards of Milltek products.

Fit

• BMW M8 Coupe (F92)

• BMW M8 Competition Coupe (F92)

• BMW M8 Convertible (F91)

• BMW M8 Competition Convertible (F91)

Engine: 4.4 Twin Turbo V8 (S63)
Only for OPF/GPF equipped cars
Model years 2020–2025