Decat Downpipe for BMW B58 – M140i, M240i, 340i, 440i – 4 inch Polished Stainless Steel
Unlock the full potential of your BMW B58 with this 4 inch polished stainless steel decat downpipe. Designed for the M140i, M240i, 340i and 440i, this performance decat dramatically reduces back pressure, improves turbo spool and enhances throttle response for a sharper, more responsive drive. If you are chasing power, sound and faster spool on your B58, this catless downpipe is the must-have exhaust upgrade.
We have used this B58 decat on our own builds and for customer cars, and the feedback has been consistently excellent. Quality is high, the finish is clean and polished, and the performance gains when paired with a remap are exactly what B58 owners are looking for. Expect a deeper, more aggressive exhaust note, quicker turbo response and stronger mid-range pull. Ideal for Stage 2 tuning on the B58 engine.
Why choose this B58 decat downpipe
- 4 inch decat downpipe – maximises flow and reduces back pressure
- Polished stainless steel – high quality construction and finish
- Improves turbo spool and throttle response on the B58 engine
- Perfect for Stage 2, remap and tuned BMW B58 setups
- Enhanced exhaust sound and turbo character
- Proven by Nforcd in-house and by happy customers
Fitment – BMW B58 decat downpipe
- BMW M140i – B58 engine
- BMW M240i – B58 engine
- BMW 340i – B58 engine
- BMW 440i – B58 engine
Fitting and support
We recommend professional installation. Nforcd offers fitting at our Warwickshire workshop. To arrange installation or request a quote, email Sales@nforcd.com.
Notes
This is a decat downpipe intended for motorsport and off-road use where emissions regulations allow. Check local laws before purchase.
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