This listing is for a Milltek Sport Cat-Back, Axle-Back, Resonated, Non-Resonated intended for Milltek. Use this upgrade to improve exhaust flow and refine tone while keeping an OEM+ fit and finish.

• Direct-fit system designed for the listed vehicle platform
• Configuration options may include resonated, non-resonated, and valved variants depending on the part number
• Professional fitment and alignment for tip position and clearance
• Intended for off-road or motorsport use where applicable, verify your local regulations

Important: OPF and GPF equipped vehicles require the correct OPF back or GPF back specification where applicable. Always match your emissions equipment when choosing an exhaust.

• Platform: Milltek
• Confirm by: Milltek part number and your VIN based build specification
• Notes: If your vehicle has additional sensors or different rear valance, confirm before ordering

• Professional installation recommended
• Allow the system to heat cycle and re-torque fasteners after initial driving
• Ensure clearance around heat shields, driveline, and rear valance
• For valved systems, verify actuator alignment and wiring routing

Shipping timing depends on supplier availability for your part number. If you need an ETA before ordering, contact us via live chat.

Returns are subject to our standard policy. Test-fit or installed exhaust components may not be returnable. Confirm part numbers before ordering.

Looking to give your BMW G80/G82 M3/M4 a serious upgrade in sound and performance? The Milltek Cat-Back / Axle-Back Exhaust System is a great way to reduce backpressure and add some character to your build.

Details:

Axle Back System with GT-115 Polished Trims - ECE Approved (OE Requires Cutting)

Key facts

• Pipe Ø: 3.15" (80.00mm)
• Tip style: 115 GT
• Fitting takes from 1.50 to 2.00 hours.

Milltek Sport is known across the globe for developing exhausts that strike the perfect balance between daily-driveable tone and track-day aggression. This system bolts on with no cutting or welding required, making it an ideal upgrade whether you're wrenching at home or scheduling with a pro installer.

Why EZT Recommends Milltek:

• Designed and manufactured in the UK for over 40 years
• Thoroughly dyno-tested and sound-tuned for street and track
• Available in resonated or non-resonated options depending on your preference
• Constructed from top-grade 304L stainless steel
• Backed by a lifetime warranty against corrosion and defects

Fast & Free Shipping: We stock these exhausts and ship next business day from our Connecticut warehouse. Delivery is fast and trackable via UPS or FedEx Ground, and shipping is always free within the USA. Need it sooner? Reach out to us for expedited options.

Installation Tips: This exhaust system bolts up using OEM hanger locations. Most systems reuse factory gaskets and clamps, but we always recommend having fresh hardware on hand for high-mileage vehicles. Torque fasteners evenly and use anti-seize on threaded sections for best results.

Vehicle Fitment:

• BMW G80/G82 M3/M4 (2021+)