Milltek Large-Bore Downpipes - Audi SQ7 / SQ8 4.0TFSI OPF

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.

Milltek Large Bore Downpipe Exhaust System for Audi SQ7/SQ8 4.0 V8 Bi-Turbo (OPF / GPF, 2020–2025 models)
Available: Hi-Flow Sport Cat or Decat version

Milltek's large bore downpipes are designed to maximize the performance and exhaust gas flow of the Audi SQ7/SQ8 4.0 V8 Bi-Turbo engine. The product is available in two options: with high-flow sport catalysts (Hi-Flow Sports Cats) or as a completely catalyst-free (Decat) solution.

The large-diameter design significantly reduces back pressure, improving engine breathing, power, and responsiveness. The result is also a considerably more aggressive and deeper exhaust sound.

Versions:

• Hi-Flow Sports Cats – improved flow combined with catalysts, suitable for street use (depending on local regulations)
• Decat – maximum flow and performance, primarily intended for track and off-road use

Features:

• Suitable for Audi SQ7/SQ8 4.0 V8 Bi-Turbo (petrol, OPF / GPF, 2020–2025 models)
• Large bore design for optimal exhaust gas flow
• Enhances power and throttle response
• Produces a significantly sportier and more powerful sound profile
• Manufactured from high-quality stainless steel
• Full compatibility with other Milltek systems

*Product is not ECE approved. For competition use only.

Confirmed fitment: