BMW Agency Performance Valved Stainless Steel Cat-back Exhaust - F30 340i / F32/36 440i

Unlock the sound and performance your BMW B58 deserves with the Agency Performance Valved Stainless Steel Cat-back Exhaust. Designed for the F30 340i and F32/F36 440i, this system delivers an aggressive, dynamic exhaust note while maintaining everyday comfort thanks to its valved design.

Built from high-grade T304 stainless steel, this cat-back is engineered for strength, durability, and perfect OEM-like fitment. With the valves closed, you get a subtle, refined tone ideal for cruising or daily commutes. Open the valves, and the system roars to life with a deep, aggressive exhaust note that enhances turbo spool and delivers sharp crackles, transforming the character of the B58 engine.

Engineered to improve exhaust flow, this system sharpens throttle response, reduces weight over stock, and provides a sound profile that can switch from tame to wild on demand.

✅ T304 stainless steel construction – durable, corrosion-resistant, precision built
✅ Valved system – quiet when cruising, aggressive when opened up
✅ Dynamic B58 tone – deep and refined with valves closed, raw and aggressive with valves open
✅ Bolt-on fitment – no cutting or welding required
✅ Pairs perfectly with OEM or aftermarket downpipes

Fitment:

• BMW F30 340i (2016–2019)

• BMW F32 440i (2017–2020)

• BMW F36 440i Gran Coupe (2017–2020)