AC Schnitzer Twin Exit Sports Exhaust Back Box/Muffler (Axle-Back) for BMW 4 Series F32/F33 435i 440i – Stainless Steel Rear Silencer with 90mm Polished Chrome Tips + Dual Outlet Valance – Coupe/Convertible M Sport Compatible

AC Schnitzer twin-exit rear box for F32 and F33 4 Series 435i and 440i

Transform the look and sound of your F32 coupé or F33 cabriolet with this premium AC Schnitzer twin-exit rear box. Crafted from high-grade stainless steel and finished with a pair of 90 mm polished outlets, it delivers a deeper, sportier tone and a perfectly balanced dual-exit aesthetic. Each tailpipe carries the etched AC Schnitzer logo for an OEM-plus finish that looks right at home on your 4 Series.

Why this upgrade

• Stainless steel construction for long-term durability and performance
• Twin 90 mm polished chrome tips, one left and one right, for a symmetrical, motorsport-inspired rear end
• Enhanced sound with a refined, sporty note
• Weight reduction compared with the standard rear silencer
• Warranty-friendly performance upgrade from a renowned German tuning house
• Includes a dark grey dual-outlet rear skirt insert where required, so there is no need to cut the factory trim
• Tailpipe finish also available in black ceramic for a stealth look

Compatibility

• BMW F32 4 Series Coupé and F33 4 Series Convertible
• 435i and 440i models, all versions
• Most M Sport variants

Note: Not compatible with the BMW M Performance rear diffuser.

What you receive

• AC Schnitzer performance rear silencer section
• Two 90 mm Sport tailpipes in polished chrome with AC Schnitzer branding
• Dual-outlet rear valance insert in dark grey where required

Fitment and ordering

Pricing varies by vehicle version. Please select your exact model from the options to view the correct price and ensure the perfect match for your car.

Professional installation is available with MJ Modifications in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk.

Tried and loved by our customers

We have installed this system on customer cars and the feedback has been consistently excellent. Owners love the premium finish, the purposeful dual-exit look and the uplift in exhaust character without compromising everyday usability.

Search terms customers use

BMW 4 Series F32 F33 435i 440i sport exhaust upgrade, twin exit rear box, stainless steel back box, performance silencer, 90 mm polished tips, dual outlet valance insert, AC Schnitzer tailpipes, axle-back sound upgrade, chrome tips, exhaust for coupé and convertible, M Sport rear bumper compatible, UK supplier and fitting Warwickshire.