BMW E90 E91 E92 E93 3 Series Fibreglass 10″ Underfloor Subwoofer Box – Custom Enclosure

Description Stealth Bass Upgrade for BMW 3 Series (E90, E91, E92, E93) This fibreglass subwoofer enclosure is custom-moulded to fit in the underfloor storage compartment of the BMW 3 Series. Designed for a 10-inch subwoofer, it delivers deep, powerful bass while keeping your boot space clean and practical with a near factory look. Features: Suits 10-inch subwoofers up to 150 mm deep Precision fibreglass construction – durable, lightweight, and resonance-free Designed for the underfloor storage compartment Internal volume: ~XX litres (spec to confirm) 10″ cutout (~250 mm) OEM-style fit – stealth install while retaining usable boot space Subwoofer not included – enclosure only Compatibility: BMW 3 Series E90 Sedan (2005–2012) BMW 3 Series E91 Touring/Wagon (2005–2012) BMW 3 Series E92 Coupe (2006–2013) BMW 3 Series E93 Convertible (2007–2013) Unlike universal MDF sub boxes, this tailored fibreglass enclosure is engineered for your BMW 3 Series. It delivers clean, powerful bass while maintaining a discreet, OEM appearance—perfect for drivers who want high-end sound without sacrificing space.