Milltek HJS 300 Cell ECE Downpipe for BMW M140i M240i 340i 440i — Euro 6, High-Flow, OEM Compatible
Unlock more performance, response and sound from your BMW with the Milltek Sport HJS 300 cell ECE approved downpipe, part number SSXBM1039. Hand engineered in the UK from 304 stainless steel, this high-flow sports cat downpipe is designed for B58-powered BMW M140i, M240i, 340i and 440i models across F20, F21, F22, F30, F31, F32 and F33 platforms, including xDrive and non-xDrive.
Built around the renowned HJS Tuning 300 cell Euro 6 catalyst, this ECE type-approved downpipe offers excellent flow and durability while keeping emissions control in check. It integrates seamlessly with both Milltek Sport cat-back systems and the OEM BMW exhaust, helps avoid engine warning lights, and is MOT friendly as updated on 22.10.2018. We run these on customer cars and our own builds and the feedback is consistently positive for throttle response, turbo spool and a deeper, refined exhaust note without unwanted drone.
Why choose this BMW B58 downpipe
- HJS Tuning 300 cell ECE sports cat for high flow and Euro 6 compliance
- Direct bolt-on fit to OEM and Milltek cat-back systems
- Constructed from premium 304 aircraft-grade stainless steel
- Refined sound with improved spool and response
- MOT friendly status noted 22.10.2018 and designed to avoid CEL/EML*
- Engineered and made in the UK by Milltek Sport
What you get
1 x HJS ECE Downpipe and Euro 6 300 cell Sports Cat for Mx40i B58 models
Specifications
Pipe diameter: 3.15 inches 80.0 mm
Compatibility
- BMW 1 Series M140i 3 Door and 5 Door F20 F21 LCI 2015 onwards
- BMW 2 Series M240i Coupe F22 LCI 2015 onwards
- BMW 3 Series 340i Saloon and Touring F30 F31 LCI xDrive and non-xDrive 2017 onwards
- BMW 4 Series 440i Coupe and Gran Coupe F32 F33 xDrive and non-xDrive 2017 onwards
*ECE approved HJS 300 cell sports cat designed to work without triggering an engine warning light and MOT friendly as updated 22.10.2018.
Fitment and verification
We offer professional fitting at Nforcd, Warwickshire. Request a quote at Sales@nforcd.com.
Before dispatch we run a compatibility check. Provide your UK registration or the last 7 digits of your VIN at checkout so we can confirm fitment.
Warranty
Milltek one year warranty.
Brand
Milltek Sport
Part number
SSXBM1039
Search-friendly terms
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