Milltek OPF Delete Midpipe - BMW F87 M2 Competition S55

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 GPF/OPF Bypass exhaust system is designed to unlock the true sonic potential of the BMW F87 M2 Competition by eliminating the effect of the exhaust backpressure-increasing particulate filter module (GPF/OPF). The result is a significantly wider sound path, a deeper and more aggressive sound, and improved breathability across the entire engine rev range.

The bypass system has been developed only for motorsport and closed racing events where emissions system restrictions do not apply.

More open and motorsport-style sound

The S55 engine's character comes into its own when the GPF/OPF no longer restricts flow:

• Deeper idle sound

• Stronger midrange and sharper response

• Attention-grabbing high-rev output sound

• The familiar “metallic” tone of the F-Series S55 engine is emphasized without unnecessary attenuation

GPF/OPF bypass is one of the most effective ways to increase the intensity of the M2C's sound on the track.

Improved flow and engine response

Bypass structure:

• reduces exhaust back pressure

• improves engine breathing and turbo spooling

• can support higher power in certain configurations (with the right support parts and programming)

• offers a significantly more dynamic throttle response

This is especially noticeable when revving and accelerating, where the S55 benefits from significantly freer flow.

Easy bolt-on installation

Milltek has designed a GPF/OPF bypass piping system:

• to fit the car's original mounting points

• compatible with either standard or Milltek Cat Back systems

• for installation without welding or permanent changes

The construction and fit meet Milltek's renowned quality standards.

304L grade stainless steel

The system is manufactured from high-quality 304L Aircraft Grade stainless steel, which guarantees:

• excellent heat and corrosion resistance

• long service life in intensive track use

• flow-optimized structure

• a clean, motorsport-inspired appearance

Compatibility: BMW F87 M2 Competition

This GPF/OPF Bypass system is suitable for:

• BMW M2 Competition (F87)

• Model years 2018–2025

• Versions with S55 engine

Not compatible with M2 N55 engine (2016-2018). Requires software modification to prevent CEL.