BMW Agency Performance valved Stainless Steel Cat-back Exhaust - G20 M340i / G22 M440i

Enhance the sound and performance of your B58-powered BMW with the Agency Performance Valved Stainless Steel Cat-back Exhaust. Designed for the G20 M340i and G22 M440i, this system combines durability, precision engineering, and adjustable sound to transform your driving experience.

Built from premium T304 stainless steel, this cat-back delivers long-lasting strength, corrosion resistance, and an OEM-quality fit. The valved design allows you to control your sound—refined and subtle with the valves closed, or raw and aggressive with the valves open. Open it up and experience a deep, throaty exhaust tone with amplified turbo spool and sharp crackles that showcase the B58 engine’s character.

Engineered for maximum flow, this system improves throttle response, reduces weight compared to stock, and creates a versatile exhaust setup perfect for both street driving and spirited runs.

✅ T304 stainless steel – strong, corrosion-resistant, and precision built
✅ Valved system – switch between refined and aggressive tones
✅ Dynamic B58 sound – deep and smooth with valves closed, raw and aggressive with valves open
✅ Bolt-on fitment – no cutting or welding required
✅ Compatible with OEM or aftermarket downpipes

Fitment:

• BMW G20 M340i (2020+)

• BMW G22 M440i (2021+)