Home » Milltek OPF Back Exhaust - BMW G8X M3/M4

Milltek OPF Back Exhaust - BMW G8X M3/M4

SKU: MIL-SSXBM1320
€3.970,04 incl. VAT
Exhaust Tips

The delivery time for products in stock is 1-3 business days.

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.

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 (outside of Europe) 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.

Milltek Sport's Particulate Filter-back exhaust system is designed for demanding BMW G8X series M3 and M4 drivers who want to take their driving experience to the next level — with quality, style and full compatibility with the car's original technology.

This system replaces the exhaust system after the OPF/GPF filter and unleashes the true sound of the S58 engine. The result is a deeper, more powerful and clearer soundstage that emphasizes the character of the M3/M4 models without disturbing echo or unpleasant resonance.

Improved, refined and powerful sound

  • Deeper bass tone and stronger engine output sound.

  • Maintains full compatibility with OPF/GPF filters.

  • Designed to produce a clean and sporty sound worthy of an M car.

Easy and fully bolt-on installation

  • Only replaces the exhaust system after the particulate filter.

  • Fits directly into original mounting points — no motor controller modifications.

304L aircraft grade steel

  • Durable, rustproof and extremely heat-resistant material.

  • Optimal airflow and long service life.

  • Milltek's renowned, clean and precise finishing guarantees a flawless result.

Compatibility: BMW G8X M3/M4 OPF/GPF models (2020–2025)