Downpipe For BMW B58 F2X m140i m240i F3X m340i m440i Series GESI Sportcat
ℹ️ DESCRIPTION
Unlock the full potential of your BMW B58 engine with the Active Autowerke GESI Sportcat Downpipe. Designed for the F2X M140i, M240i, and F3X M340i, M440i Series, this high-performance downpipe overcomes the restrictive factory design to significantly improve exhaust flow and turbo efficiency. Experience quicker turbo spool-up, increased horsepower, and sharper throttle response. By optimizing exhaust gas evacuation, it delivers faster acceleration, enhanced turbo responsiveness, and a more engaging drive—transforming your B58 into an even more thrilling powerhouse.
| CEL Performance | NO CEL for catalytic efficiency when using this downpipe |
| Compliance | GESI EPA registered high flow and fully OBD2 compliant |
| V-Band | Casted upper stainless steel V-Band for precise fitment |
| Piping | 4.50" diameter piping allows for maximum power output |
| Turbo Response | Quicker turbo spool |
| Power Rating | Rated for 500 to 850 hp applications |
| Temperature Rating | Withstands up to 1500 F |
| Efficiency | Can reach operational efficiency within 9 seconds of startup |
| Installation | Easily bolts-on - no cutting or welding required |
| Construction | Durable construction from TIG welded 304 stainless steel |
| Fitment | Precise fitment |
| Catalyst | Ultra high flow 400 cell per square inch catalyst |
| EPA Compliance | EPA compliant for use on OBD2 vehicles (1996 and newer) except in California |
| Substrate | 304 stainless steel substrate is furnace braised to the mantle for outstanding durability |
| Technology | GESI proprietary precious metal loading technology ensures greatly reduced emissions |
| Application | Ideal for Forced Induction Applications with no loss of HP |
| Safety | Both passengers and drivers are safe from harmful emissions and noise |
🔍 Fitment:
-
2016-2019 BMW B58 F20 F21 BMW M140i
- 2015-2019 BMW B58 F22 M240i
- 2015-2019 BMW B58 F30 F31 340i
- 2015-2019 BMW B58 F32 F33 F36 440i
📜 POLICY
🚚 Ships from nearest warehouse within 1 business day, arrives in 5-8 days（most area in 7 days）
🔄 30-day return policy
🔧 2-year replacement warranty
Note:
🔖 Contact Us First: If you encounter any issues with your order, please reach out to us immediately. We're committed to resolving any concerns quickly and to your satisfaction.
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📮 Contact Email: support@samexhaust.com
Our Policies
SHIPPING
Ships from nearest warehouse within 1 business day, arrives in 5-8 days (most areas in 7 days).
RETURNS
30-day return policy for all products.
WARRANTY
2-year replacement warranty on all parts.
OEM EXHAUST MANIFOLDS VS PERFORMANCE HEADERS
Attention
Products on this site are for off-road/racing use only and are not legal for public roads where emissions laws apply.
Professional installation recommended. Removing emissions equipment (DPF, CAT, SCR, DOC) requires deleting related sensors and a compatible tuner to avoid engine codes.
Performance gains may vary—no guarantees.