Milltek Cat Back Exhaust - BMW F20/F21 LCI M140i 2015-2018 RWD

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.

The Milltek Sport Cat Back exhaust system is designed for the BMW M140i. The Milltek Cat Back system produces a truly sporty, deeper and more dynamic sound.

The Cat Back exhaust system replaces the rear section of the exhaust system and improves exhaust flow, adding character and sportiness to the driving experience.

Rich and sporty B58 sound

Milltek has tuned this system to highlight the strengths of the B58 engine:

• Deep and warm sound at idle

• Lively and dynamic sound during acceleration

• Clear and pleasant output sound at high revs

• No annoying resonance or drone at cruising speeds

The sound profile is clearly louder than the standard system, but still well controlled in daily driving.

Improved flow and ride feel

Milltek Cat Back System:

• reduces exhaust back pressure

• supports engine's sensitive throttle response

• improves the overall driving experience

The freer-flowing structure also supports moderate power upgrades.

Easy bolt-on installation

The exhaust system is designed:

• to fit directly into the car's original mounting points

• for installation without welding or permanent changes

• to provide OEM-level fit and finish

Installation is straightforward and maintenance-friendly.

304L Aircraft Grade Stainless Steel

Milltek uses only high quality 304L grade stainless steel, which offers:

• excellent corrosion and heat resistance

• long service life

• flow-optimized structure

• carefully finished TIG welds

The choice of materials meets Milltek's premium quality standard.

Fit

• BMW M140i 3-door (F20 LCI)

• BMW M140i 5-door (F21 LCI)

Only for rear-wheel drive models, without OPF.