Milltek Sport Cat-Back (OPF/GPF-Back) Race Exhaust, Polished GT-90 Tips, Stainless Steel BMW M4 F82 Coupe, F83 Convertible & M4 Competition 2019-2020 (OPF/GPF Only) SSXBM1117

Performance Rear System with Polished 90 mm Quad Tips for BMW M4 F82 F83 2019 to 2020 OPF-GPF Models

Part number: SSXBM1117

Unlock the sound and feel your M4 deserves with this Milltek rear section for OPF-GPF equipped cars. Crafted in Britain from premium T304 austenitic stainless, this free-flowing system sharpens throttle response, adds a deep motorsport character and gives a purposeful look thanks to the mirror-finished 90 mm GT tailpipes. Perfect for drivers seeking an M4 sound upgrade and a high quality UK-built system that fits beautifully and lasts.

Why enthusiasts choose this system

• UK engineered and hand finished from high grade T304 stainless for outstanding corrosion resistance and longevity.
• Mandrel bent pipework for smooth gas flow and a freer revving S55 without sacrificing mid-range punch.
• Acoustically developed race tone with crisp upshifts and minimal cabin resonance when cruising.
• Polished GT 90 mm quad tailpipes deliver a bold OE-plus look that fills the rear valance perfectly.
• OPF-GPF back layout designed specifically for particulate filter cars, retaining factory sensors and compatibility.
• Direct replacement fit with precise alignment and high quality welds for a clean, durable install.

Fitment and compatibility

• BMW M4 F82 Coupe 2019 to 2020 with OPF-GPF
• BMW M4 F83 Convertible 2019 to 2020 with OPF-GPF
• BMW M4 Competition 2019 to 2020 with OPF-GPF
• Milltek part number: SSXBM1117

Built to perform, built to last

From the constant-radius bends to the carefully optimised bore size, every detail is tuned to enhance flow and soundtrack while maintaining day-to-day usability. The high nickel content T304 material resists tarnish and heat cycling, so it keeps its finish and tone for the long term. The result is a sharper, more engaging drive and a premium finish to match the M badge.

Tried, tested and loved by our customers

We run this setup on customer cars and feedback is consistently positive. Owners praise the refined yet aggressive note, the quality of the welds and the way the GT-90 tips transform the rear end. It sounds how an M4 should without the headache of drone.

Professional fitting

Have it installed by specialists. MJ Modifications in Warwickshire offers expert fitting and alignment for BMW and Milltek systems. Request a quote at info@mjmodifications.co.uk.

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