AA Signature Equal Length Midpipe BMW G80/G82 M3, M4

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.

AA Signature Equal Length Midpipe is a high-quality midpipe upgrade for BMW G80 M3 and G82 M4 models, designed to optimize exhaust flow and fine-tune the S58 engine's sound profile in a technically controlled manner. The solution represents **Active Autowerke**'s Signature collection and is based on the manufacturer's long-standing experience with BMW M exhaust solutions.

The Equal Length design ensures that exhaust gases travel an equal distance from the cylinders before merging. This balances exhaust pulses, reduces flow deviations, and produces a cleaner, smoother, and more consistent sound profile across the entire RPM range. The sound is clear and assertive under load but remains controlled and pleasant during steady driving without intrusive resonance.

The midpipe is designed to be compatible with the original rear section and works with most aftermarket exhaust systems. Installation is simple and straightforward, and the original midpipe can be reinstalled if needed.

The construction is made from 100% brushed 304 stainless steel, which provides good corrosion resistance and longevity in demanding operating conditions.

Features

• High-quality 304 stainless steel construction

• Equal Length design balances flow and sound

• Clean, smooth, and controlled sound profile

• Compatible with most aftermarket exhaust systems

• Easy and simple installation

• Original midpipe can be reinstalled if needed