BMW G20 M340i / G22 M440i LCI Valved Cat-Back Exhaust — SS304 Stainless (2019+)
Your M340i or M440i sounds too quiet. That's not your fault — the factory exhaust is built to be polite. This valved cat-back from Bosca fixes that: quiet and civilized when the valves are closed, properly loud when you open them up.
Built from SS304 stainless steel with mandrel-style bends, valved mufflers, and a clean factory-style fit. The spec sheet walks through the full layout — downpipes-back coverage with electronic valve control so you choose the soundtrack.
Fitment: BMW G20 M340i / G22 M440i (LCI models, 2019+ per supplier listing). Confirm your year, model, trim and VIN before ordering.
Safety: Professional installation recommended. Check your local noise and emissions regulations before installing any aftermarket exhaust.
Factory-direct from China: Made in China and sourced straight from the vetted factory — no middleman markup. Ships from our factory partner with tracking provided. Delivery times vary by destination.
Aftermarket part — not a genuine OEM product, and not sponsored or endorsed by the vehicle manufacturer. Fitment is verified on every order before it ships.
WARNING: This product can expose you to chemicals including engine exhaust, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Ships from our factory partner with tracking provided. Delivery times vary by destination.
Your M340i or M440i sounds too quiet. That's not your fault — the factory exhaust is built to be polite. This valved cat-back from Bosca fixes that: quiet and civilized when the valves are closed, properly loud when you open them up.
Built from SS304 stainless steel with mandrel-style bends, valved mufflers, and a clean factory-style fit. The spec sheet walks through the full layout — downpipes-back coverage with electronic valve control so you choose the soundtrack.
Fitment: BMW G20 M340i / G22 M440i (LCI models, 2019+ per supplier listing). Confirm your year, model, trim and VIN before ordering.
Safety: Professional installation recommended. Check your local noise and emissions regulations before installing any aftermarket exhaust.
Factory-direct from China: Made in China and sourced straight from the vetted factory — no middleman markup. Ships from our factory partner with tracking provided. Delivery times vary by destination.
Does this fit my car?
Enter your vehicle details below. We'll confirm exact fitment with your year, trim and VIN before you order — never guess, never assume.
Shipping: Ships from our factory partner with tracking provided. Delivery times vary by destination. Import duties for your country may apply at delivery.
Why StealthTorque
Same factories the industry buys from. None of the middleman markup.
| Compare | StealthTorque | Typical US retailer | Marketplace sellers |
|---|---|---|---|
| Pricing | Factory-direct. No middleman markup. | Marked up through distributors and retail overhead. | No pricing standard. Varies wildly. |
| Manufacturer vetting | Every factory reviewed before a part earns a listing. | Varies by brand. | No vetting. Anyone can list. |
| Fitment verification | Free VIN check before dispatch. | Fitment charts. Rarely VIN-verified. | You're on your own. |
| Buyer reviews | Real reviews from the manufacturer's listing. | Store reviews only. | Often missing or unreliable. |
| Shipping | Tracked, factory-direct. | Domestic warehouses. | Often untracked. |
| Support | Direct help from people who know the parts. | Ticket queues. | None. |