Remus Performance Valved Axle-Back Exhaust Rear Silencer/Backbox/Muffler with OE Valve Control, Quad 102mm Chrome Tips, Stainless Steel for BMW 5 Series G30/G31 540i B58 2017+ (Saloon & Touring)

Transform your BMW 540i with a premium valved axle-back upgrade that delivers a deep motorsport tone, stunning quad 102 mm polished tips and precision build quality for the G30 Saloon and G31 Touring.

This performance rear box is engineered for the B58B30A-powered 5 Series and uses your factory flap motors for seamless drive mode control. The result is everyday civility when closed and a richer, more engaging soundtrack when open. We have fitted this system to multiple customer cars and the feedback has been outstanding for both sound and build quality.

• For BMW 5 Series G30 and G31 540i, 2017 onwards, 250 kW B58B30A
• Active valve operation via the original electronics and actuators
• Quad 102 mm angled, straight-cut, chrome-finished tailpipes that fill the rear beautifully
• Bead-blasted exterior, crafted entirely from high-grade stainless steel
• Optimised gas flow for reduced restriction and a noticeable performance uplift
• Lightweight construction to help shed mass at the rear axle
• OE-level fit, precise alignment and premium craftsmanship
• Handbuilt in Austria for exceptional longevity and finish

Why enthusiasts choose this upgrade

• Sports exhaust character with valve control for the best of both worlds
• Enhanced throttle response thanks to freer-flowing internals
• Eye-catching quad exit look with mirror-bright chrome tips
• Durable, corrosion-resistant materials and meticulous welds

Fitment notes

• You must use the original rear diffuser from the BMW G30 550i: BMW part number 51 12 8 067 763
• Designed specifically for the 540i G30/G31 with the B58 engine from 2017 onwards

Part number
088017 1500+0046 70SG

Installation and support
For professional fitting, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and lead times. We can supply and install, align the quad tips perfectly and ensure the valve operation works exactly as intended.

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