Milltek Cat Back Exhaust - BMW E46 M3

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 E46 M3 · 3.2 S54 · Coupé & Cabriolet · 2001–2007

The Milltek Sport Cat Back exhaust system is designed to bring the sound of the legendary BMW E46 M3's 3.2-liter S54 engine to a new level. The S54 is known for its rev-sensitive, high-revving and mechanically clean nature. Milltek enhances this nature by adding depth, resonance and dynamism to the sound without compromising the car's OEM drivability.

The Cat Back system replaces the rear section of the exhaust system and provides a significantly richer and sportier sound that perfectly matches the character of the iconic E46 M3.

Truly sporty and recognizable S54 sound profile

Milltek Cat Back produces:

• Deeper and cleaner sound at idle

• Accurate and responsive midrange

• At high revs, a resonance-free, motorsport-style output sound

• Controlled noise level without disturbing drones

The system emphasizes the iconic characteristics of the S54 engine: mechanical singing, linear sound growth, and brightness in the peak power range.

Easy bolt-on installation

Milltek has designed the Cat Back system to attach to:

• directly to the car's original mounting points

• without welding or permanent changes

• compatible with OEM front pipes

Installation is straightforward and designed with OEM-level fitment in mind.

304L Aircraft Grade Stainless Steel

The whole is made of high-quality 304L grade stainless steel:

• Excellent corrosion resistance

• High temperature tolerance

• Flow-optimized internal structure

• Carefully finished TIG welds

The material quality meets aerospace industry standards and ensures a long service life and excellent performance.

Fit:

• BMW M3 E46 Coupe

• BMW M3 E46 Convertible

Engine: 3.2 S54
Model years 2001–2007