OPF/GPF-back valve-controlled rear section with GT-115 burnt blue titanium tailpipes for BMW 8 Series M8 and M8 Competition F91 Cabrio and F92 Coupe

Transform the soundtrack and presence of your 4.4 litre twin-turbo V8 with this premium UK-made rear section from Milltek. This OPF/GPF-back, valve-controlled back box bypass unlocks a deeper, richer tone with the valves open while keeping refined cruising manners when closed. Finished with striking GT-115 burnt blue titanium quad tips, it delivers the drama, quality and fitment discerning BMW M8 owners expect.

Crafted from aerospace-grade T304 stainless steel with precision mandrel bends, the system optimises gas flow and durability. It retains the factory valve control for seamless integration with your drive modes, and because it sits after the particulate filters, it is designed specifically for OPF/GPF-equipped cars. Expect a purposeful sound, a sharper response and a head-turning rear look without compromise.

Highlights

• OPF/GPF-back rear section for OPF/GPF-equipped vehicles only
• Valve-controlled rear silencer bypass for switchable volume and tone
• GT-115 burnt blue titanium quad tailpipes for a motorsport-inspired finish
• T304 stainless steel construction with mandrel-bent pipework for smooth flow
• Engineered for a clean, sporty soundtrack with minimal cabin drone
• Direct-fit, reversible upgrade designed and hand finished in the UK

Fitment

BMW 8 Series M8 and M8 Competition, F91 Convertible and F92 Coupe, 2020 onward, OPF/GPF-equipped models only.

What owners say

We have supplied and fitted this system for many M8 clients and the feedback is consistently excellent. Customers love the valve-open aggression, the refined tone on longer journeys and the standout look of the burnt blue titanium tips. If you want a serious sound upgrade for your M8 without changing the OPF/GPF, this is the go-to choice.

Installation

Professional fitting available at MJ Modifications in Warwickshire. To request a quote or book an appointment, email info@mjmodifications.co.uk.

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