RPM Performance – BMW 420i F32 F36 B48 Exhaust Back Box Delete

Enhance the sound and performance of your BMW 420i F32 F36 B48 with the RPM Performance Back Box Delete Exhaust, expertly engineered for maximum flow, tone, and quality.

Manufactured in the UK, this system is crafted from CNC mandrel-bent T304 stainless steel to ensure perfect fitment, exceptional strength, and long-term corrosion resistance. Unlike generic aftermarket options, RPM Performance exhausts are precision-built for both sound and performance — delivering a sharper, more aggressive exhaust note while retaining the rest of your factory system.

This conversion features 3-inch stainless steel pipework and twin 4-inch polished stainless steel tips for a clean, motorsport-inspired finish. To complete installation, a dual-exit rear diffuser is required.

Fully MOT compliant and supplied with all necessary clamps and fixings, the system installs easily and transforms your BMW’s exhaust tone without exceeding legal decibel limits.

The RPM Performance Back Box Delete Exhaust offers the perfect balance of performance, sound, and craftsmanship — an ideal upgrade for 420i drivers seeking a more engaging and distinctive driving experience.

SKU: RPM-420I-DBBD

KEY FEATURES

• 3" CNC mandrel bent pipe work
• 4" Polished exhaust tips
• Comes complete with clamps
• T304 stainless steel
• Handmade in the UK
• Fully Mot Compliant as the system is under the required decibel limits