Punchier Turbo Sound & Serious Pulls for Your BMW B58
Dial up your turbo whistle and feel that instant power surge with the BMW B58 Catless Downpipes 4.5″, made for M240i, 340i, 440i, 540i, 740i, and 840i from 2016 to 2022. Whether you’re lining up for rolling runs or just want your exhaust to snap necks in the parking lot, this upgraded downpipe is the mod your build deserves.
Made for More Power, Built for Street Legends
The massive 4.5-inch TIG-welded stainless steel body lets your turbo breathe free. That means spool-up happens quicker, throttle response jumps, and power increases instantly, even more with a good tune. Ditching the stock restrictor gives you that unmistakable straight-six snarl.
Sleek Looks and Zero Hassle Fitment
Nothing ruins Saturday plans like parts that don’t fit. This downpipe pairs smoothly with your original cat-back or any aftermarket exhaust, no surprises, no hassle. The CNC-machined flange transitions cleanly from turbo to mid pipe for max flow and a stealthy underbody look.
Weekend Cruise, Track Day, or Midnight Lot, Your Call
Whether you’re lining up for a late-night highway run or parking up at your favorite burger spot, that sharper sound and snappier throttle will have everyone asking what’s under the hood. Simple install, legendary results.
Perfect for Car Meets and Late Night Cruises
No matter if you’re flexing at local meets or out chasing sunsets, this downpipe dials your BMW’s personality up to 11. Louder, quicker, and built to turn curious heads in any parking lot. It’s what you want if you love that feeling when the turbo kicks and everyone looks over.
- Product: BMW B58 Catless Downpipes 4.5″ | M240i, 340i, 440i, 540i, 740i & 840i (2016, 2022)
- Handcrafted 4.5″ 304 stainless steel with CNC flanges
- Fits both RHD and LHD models with no mods needed
- Compatible with all stock and aftermarket catbacks
- Proven gains: 25-30hp with a tune, 90hp+ with stage 2
- Direct-fit for:
- 2016 – 2022 F22/F23 BMW M240i & M240i xDrive
- 2016 – 2022 F30/F31 BMW 340i & 340i xDrive
- 2016 – 2022 F32/F33/F36 BMW 440i & 440i xDrive
- 2016 – 2022 G30 BMW 540i & 540i xDrive
- 2016 – 2022 G32 GT BMW 640i & 640i xDrive
- 2016 – 2022 G11/G12 BMW 740i & 740i xDrive
- 2018 – 2022 G14/G15 BMW 840i & 840i xDrive
Dial in That Extra Edge, Upgrade Now
Why roll stock when every meet is a chance to show out? Updates like this move fast, grab your 4.5″ BMW B58 Catless Downpipe before they sell out!

















