Milltek OPF Back Exhaust - BMW F90 M5 LCI OPF 2021-2025

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 BMW F90 LCI M5 and M5 Competition models with the powerful 4.4 Twin Turbo V8 engine (S63) and factory-fitted OPF/GPF particulate filter . This solution improves sound quality and exhaust gas flows by replacing the section of the exhaust system after the particulate filter , while keeping the original emissions system components in place.

The Particulate Filter-back provides a sportier, more open sound without interfering with daily drivability or the operation of the emissions system.

Sporty and sophisticated V8 sound

Milltek has developed this exhaust system specifically for OPF/GPF-equipped M5/M5 Competition models:

• Deeper and fuller V8 sound at idle

• More powerful and dynamic sound during acceleration

• Controlled yet sporty sound even at high revs

• No annoying resonance or drone when driving on the road

The sound system complements the performance of the S63 engine and makes the driving experience even more exciting.

Improved flow and response feel

Particulate Filter-back solution:

• reduces exhaust back pressure after the particulate filter

• improves engine throttle response

• supports the engine's natural operating range

• maintains the functionality of the original particulate filter

This flow improvement makes the sound more open and the car feel more responsive without compromising on everyday driving.

Easy bolt-on installation

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

• to work seamlessly with the F90 LCI's powertrain and drivetrain

• for installation without welding or structural changes

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

304L Aircraft Grade Stainless Steel

The system is made of high quality 304L grade stainless steel , which provides:

• excellent corrosion and heat resistance

• long-lasting structure

• flow-optimized internal design

• carefully finished welds

The material meets Milltek's strict premium quality standards.

Fit

• BMW M5 (F90 LCI)

• BMW M5 Competition (F90 LCI)

Engine: 4.4 Twin Turbo V8 (S63)
Only OPF/GPF equipped cars
Model years 2021–2025