Akrapovic BMW Z4 M40i G29 B58 Titanium Axle-Back Exhaust with Carbon Tips - Slip-On Rear Silencer/Back Box, EU/ECE Road-Legal Type Approved, OPF/GPF/PPF Compatible (2019+) - Sports Performance Muffler Upgrade S-BM/T/9H

Akrapovic S-BM/T/9H for BMW Z4 G29 M40i - Titanium Rear Section with Carbon Tailpipe Finishers

Transform your G29 M40i with Akrapovic’s titanium rear silencer S-BM/T/9H. Precision built from ultra-lightweight titanium and finished with four hand-crafted carbon sleeves, this axle-back upgrade delivers a richer straight-six soundtrack, sharper throttle response and a premium OEM-plus look. EU type approved for petrol particulate filter models, it is the perfect road-legal sound upgrade for UK and European use.

Searching for a Z4 M40i sports exhaust, titanium rear box, carbon tip system, EU homologated back box, GPF-friendly performance system, lightweight muffler upgrade or BMW G29 sound enhancement? This is the benchmark choice for quality, tone and weight saving.

Why enthusiasts choose this system

• Titanium construction - significantly lighter than the factory rear section for improved agility and heat management
• Four round carbon fibre tailpipe finishers - a purposeful, premium motorsport aesthetic
• Noticeable improvements in response and drivability across the rev range
• Deep, mature tone in normal driving with a more assertive note under load
• EU type approval for models with petrol particulate filter - ideal for UK roads

Real-world gains you can feel

Built to enhance the B58-powered Z4 M40i, this titanium rear section trims weight and unlocks extra character from the turbocharged straight six without unwanted drone. Add the optional Akrapovic Sound Kit for convenient valve control and instant sound tailoring from the cabin.

Performance data

• Power increase: +2.2 kW at 2400 rpm
• Torque increase: +7.4 Nm at 2400 rpm
• Weight reduction: -6.1 kg versus OE

Fitment and build quality

Engineered to match the lines of the G29 chassis for factory-level alignment and clearance. Titanium and carbon fibre materials provide durability, corrosion resistance and a high-end finish that elevates the Z4’s rear profile.

Compatibility

BMW Z4 G29 M40i - 2019 onwards, including OPF/GPF-equipped vehicles.

Part number

S-BM/T/9H

Important notes

• EU type approval valid only for vehicles equipped with a petrol particulate filter.
• OE exhaust requires a cut to install this rear section. Please review the installation guide before starting.
• Optional Akrapovic Sound Kit available for valve control.
• Further tuning potential with Akrapovic Evolution link pipes and performance downpipe. Installing these parts or the Sound Kit may invalidate EU type approval.

Tested by us - loved by our customers

We have fitted and driven this Akrapovic system on the Z4 M40i and feedback has been consistently outstanding. Customers praise the weight saving, the tasteful sound, the perfect fit and the premium finish. It is a genuine upgrade for drivers who want refinement and excitement in one package.

Professional fitting

Want it installed properly first time? Book expert fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Pre-dispatch compatibility check

To ensure the correct part, we can verify compatibility before shipping. Add your UK registration or the last 7 digits of your VIN at checkout.

Manufacturer and warranty

Manufacturer: Akrapovic
Warranty: Akrapovic one-year warranty

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