AC Schnitzer Quad-Exit Performance Sports Exhaust Rear Silencer/Backbox, Ceramic Black 4x90mm Tips, for BMW 6 Series F12/F13 Coupe/Convertible 640d Diesel - Quad Tailpipe Axle-Back Muffler Upgrade

Quad outlet backbox upgrade for BMW 6 Series F12 and F13 640d

Elevate the rear of your BMW with the AC Schnitzer quad outlet rear silencer. This premium backbox delivers a richer, more purposeful tone and a sharper, motorsport-inspired look thanks to four 90 mm tail exits in a deep ceramic-coated black finish, each laser-etched with the AC Schnitzer signature. It is the quad-outlet variant of the renowned AC Schnitzer performance rear silencer, engineered to blend daily refinement with a more engaging soundtrack and a bolder stance.

Key highlights

• Quad 4 x 90 mm tail exits for an aggressive, symmetrical finish
• Black ceramic-coated tips with etched AC Schnitzer branding
• Premium performance backbox architecture for a deeper, refined tone
• Designed specifically for BMW 6 Series F12 and F13 fitment
• Precision German tuning heritage and OE-level attention to detail

Compatibility and rear valance requirements

• BMW 6 Series F12 and F13, including 640d diesel
• SE and Sport models require the AC Schnitzer rear skirt for correct installation
• M Sport models require the AC Schnitzer carbon fibre rear diffuser
• Not compatible with the factory standard rear skirt or valance
• Please select the appropriate engine option when ordering. Note: petrol variants utilise the export rear silencer specification

Why choose this quad outlet system

• Transforms rear-end styling with a true quad exit conversion
• Refined acoustics on the motorway with a sportier note under throttle
• Perfect visual match for diffuser-equipped bumpers and styling packs
• High-quality finish that resists heat discolouration

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. We have fitted this setup to customer 6 Series builds and feedback on tone, fit and finish has been excellent. Request a fitting quote: info@mjmodifications.co.uk.

Search-friendly summary

BMW 6 Series F12 F13 640d quad outlet backbox, performance rear silencer, quad tailpipe upgrade, black ceramic tips, AC Schnitzer branded tips, rear muffler upgrade, quad exit conversion, diffuser compatible exhaust, rear skirt compatible, 4 x 90 mm tailpipes, F12 convertible and F13 coupe fitment, diesel performance sound upgrade, premium German tuning exhaust system.

Make your 6 Series stand out with a beautifully finished quad outlet look and a more engaging soundtrack. Order your AC Schnitzer quad outlet rear silencer today.