BMW G30/G31 540i Axle-Back Exhaust Rear Sport Muffler

Introducing the WeldAffection Valvetronic Exhaust System for the BMW G30 / G31 540i — a precision-engineered, direct bolt-on upgrade crafted from high-grade T304 stainless steel.

This system offers the perfect balance between refined cruising and aggressive sport mode driving.

As a bonus, the kit also includes an M5-style rear diffuser, completing the performance and aesthetic package.

Exhaust System Features:

• 100% bolt-on installation — no cutting or welding required

• Constructed from premium 304 stainless steel mandrel-bent piping

• Fully TIG/Argon welded for strength and durability

• Catless design — ideal for track, race, or ECU remapping applications

• Noticeable horsepower and torque gains

• Produces a deep, aggressive tone under load and a refined note while cruising

• Includes M5-style rear diffuser for enhanced appearance

This Downpipe Kit is Compatible with the following BMW model:

• BMW G30 / G31 540i with the B58 engine