Milltek Sport BMW F40 M135i Quad Exhaust with Black tips

Product Description

The Milltek Sport Quad Exhaust System for the BMW F40 M135i is a performance exhaust upgrade designed to enhance sound, improve exhaust flow and give the car a more purposeful rear-end appearance.

Developed specifically for the F40 M135i platform, this system helps sharpen the character of the B48-powered M135i with Milltek’s signature performance exhaust tone. The result is a more aggressive and engaging sound profile while retaining the refinement expected from a high-quality road car system.

Manufactured in the UK from 304L aerospace-grade stainless steel, the Milltek Sport system is built for durability, fitment quality and long-term performance. Improved exhaust gas flow and reduced back pressure can also support sharper throttle response and a more responsive driving feel.

Available with a choice of tailpipe finishes including Polished, Cerakote Black, Titanium and Burnt Titanium, this direct bolt-on valved replacement system is ideal for fast road, spirited driving and trackday-focused F40 M135i builds.

Further information below.

Key Features

Milltek Sport Quad Exhaust System
Designed for BMW F40 M135i
Developed specifically for the F40 platform
Suitable for B48-powered M135i models
Signature Milltek Sport exhaust tone
Sharper, more purposeful sound profile
Increased presence and aggression
Aggressive yet refined exhaust note
Improved exhaust gas flow
Reduced back pressure
Can support sharper throttle response
Potential weight saving over the factory system
Direct bolt-on replacement system
Valved exhaust design
Quad-exit appearance
Manufactured in the UK
Made from 304L aerospace-grade stainless steel
High-quality fitment and construction
Suitable for road, fast road and trackday use
Tailpipe finish options:
Polished
Cerakote Black
Titanium
Burnt Titanium

Vehicle Compatibility

BMW F40 M135i
Designed for compatible BMW F40 M135i models.
Please confirm exact vehicle model, year, drivetrain, exhaust configuration, valve compatibility and preferred tailpipe finish before ordering.

What's Included

Milltek Sport Quad Exhaust System
Valved exhaust system components
Quad-exit rear exhaust layout
Selected tailpipe finish
Vehicle-specific fitting components supplied by Milltek
Tailpipe finish options available:
Polished
Cerakote Black
Titanium
Burnt Titanium
Additional hardware, trims, rear diffuser modifications, software and fitting consumables are not included unless supplied separately.

FAQs

What does the Milltek Sport Quad Exhaust System do?

It upgrades the factory exhaust system to improve sound, enhance exhaust flow and give the BMW F40 M135i a more aggressive quad-exit appearance.

Which vehicle does this system fit?

It is designed for the BMW F40 M135i.

What engine is this designed for?

It is designed for the B48-powered BMW F40 M135i.

Will it make the car louder?

Yes. The system is designed to provide a sharper, more purposeful Milltek Sport exhaust tone with increased presence.

Is the sound still refined?

Yes. The supplied information describes the tone as aggressive yet refined.

Does it improve performance?

The system is designed to improve exhaust gas flow and reduce back pressure, which can support sharper throttle response and improved performance feel.

Is this a valved exhaust system?

Yes. The supplied information describes it as a direct bolt-on valved replacement system.

What is the exhaust made from?

It is manufactured from 304L aerospace-grade stainless steel.

Where is it manufactured?

Milltek Sport exhaust systems are manufactured in the UK.

What tailpipe finishes are available?

Available tailpipe finishes include Polished, Cerakote Black, Titanium and Burnt Titanium.

Is this suitable for track days?

Yes. It is suitable for spirited road driving, fast road use and trackday applications.

Is it a direct bolt-on system?

Yes. The supplied information states it is a direct bolt-on replacement system.

What should I check before ordering?

Please confirm vehicle model, year, drivetrain, exhaust valve compatibility, rear diffuser clearance and preferred tailpipe finish before ordering.

Shipping & Delivery

Dispatch Times

Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.

UK & International Shipping

We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.

Import Duties & International Orders

International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.

Damaged Shipments

If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.

Returns

Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.

Full details are available in our Shipping Policy and Returns & Refund Policy.

Warranty & Disclaimer

Warranty

Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.

Fitment & Installation

Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.

Motorsport Use Disclaimer

Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.

Product Images & Descriptions

Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.

Full details are available in our Terms of Service and related policy pages.