Milltek High Flow Downpipe + Midpipe - BMW E9X M3 S65

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.

BMW E9X – M3 (E90/E92/E93) · 4.0 V8 S65 · 2007–2011

For racing, track and off-road use only. Not for road use without appropriate modification and emissions approvals.

The Milltek Sport Hi-Flow Sports Cat & Downpipe system is a performance-oriented upgrade for the legendary BMW M3 E9X generation 4.0-liter V8 S65 engine. This package replaces the original front exhaust system, providing significantly freer flow, faster throttle response, and a more aggressive and fuller soundstage.

The high-flow performance filter and flow-optimized downpipe are designed to maximize engine breathing and improve performance across the entire rev range – especially at high revs, where the S65 engine shines.

Significantly improved flow and response

Milltek Hi-Flow Sports Cat:

• reduces exhaust back pressure

• improves engine breathing

• improves revving and throttle response

• enables higher power output with support components and programming

The flow-optimized downpipe and high-flow catalytic converter together form a structure that supports the S65's inherent rev sensitivity.

Deeper, more dynamic and motorsport-inspired sound

The system produces:

• deeper bass range

• a more open and penetrating midrange

• aggressive, high-revving output sound

• cleaner and resonance-free sound

The sound profile better matches the sporty nature of the E9X M3 and allows the S65 engine to sound truly befitting its performance.

304L Aircraft Grade Stainless Steel

Like all Milltek premium components, this system is made of:

• 304L grade aircraft-grade stainless steel

• With TIG-welded and flow-optimized construction

• withstand high thermal loads and intensive use on the track

The choice of materials ensures a long service life and a carefully finished appearance.

Bolt-on installation and perfect compatibility

• fits the car's original mounting points

• can be combined with a Milltek Cat Back system or OEM exhaust

• does not require welding or changes to the car's structures

• offers OEM-level fit

Fit:

• BMW M3 E90 (Sedan)

• BMW M3 E92 (Coupe)

• BMW M3 E93 (Convertible)

Engine: 4.0 V8 S65
Model years 2007–2011

The Milltek Sport Hi-Flow Sports Cat & Downpipe is the perfect choice for the driver who wants to:

• improves exhaust flow and engine breathing

• a more powerful and motorsport-inspired sound

• better throttle response and potentially more power

• high-quality and long-lasting premium construction

• compatibility with all E9X M3 models

This update takes the performance and sound of the BMW E9X M3 to a new level – on the track and in other recreational use.