BigBoost BMW Gen 1 B58 EFR Single Turbo Kit for F20 F22 F30 F32 platforms - fits M140i M240i 340i 440i and X3 M40i
Unlock serious B58 power with the BigBoost EFR turbo kit. Engineered for BMW B58 Gen 1 and B58 TU 6-port engines, this BigBoost upgrade transforms your M140i, M240i, 340i, 440i or X3 M40i into a relentlessly fast, responsive and reliable road and track machine. Using BorgWarner EFR technology and a high-flow cast twin-scroll manifold with an external wastegate port, this is the B58 turbo upgrade enthusiasts search for when they want big power, fast spool and OE-grade durability.
At Nforcd we run and install these kits and our customers love them for their response, drivability and top-end punch. If you are looking for a proven BMW B58 turbo kit in the UK, this is it.
Power options
- EFR 8374 - up to around 650 whp
- EFR 8474 or EFR 9174 - up to around 750 whp
- EFR 9280 - up to around 900 to 1000 whp
Choose the EFR that best matches your goals for fast spool street performance, track-day balance or maximum top-end power.
Key features
- BorgWarner EFR performance turbocharger options: 8374, 8474, 9174, 9280
- BigBoost cast twin-scroll manifold with runners and area approximately 40 percent larger than stock, plus external wastegate port for precise boost control
- 4 inch aluminium turbo inlet and lower boost pipe for improved flow
- Aviation-grade stainless steel oil feed lines and full oil and coolant fitting kit
- Heat management and robust hardware throughout for reliability
What’s included
- BorgWarner EFR 8374, 8474, 9174 or 9280
- Cast twin-scroll manifold 40 percent larger than stock runners and area with external wastegate port
- Aviation grade stainless steel oil feed lines
- Oil feed and return fittings for turbo
- Oil feed fittings for engine
- Oil drain adapter
- Lower boost pipe
- Aluminium 4 inch inlet pipe
- Silicone couplers
- Smart Seal stainless steel hose clamps
- Turbo coolant inlet and outlet banjo fittings
- Engraved heat shield
- VPE V Band clamp
- Exhaust manifold gasket
- OEM O-ring kit
- Aeroquip coolant hose kit
- EWG mounting bracket
- EWG linkage kit
Tuning requirement
This turbo kit requires custom tuning via a known platform such as MHD or BM3 for correct boost control, fuelling and safety.
Compatibility - BMW B58 Gen 1 and B58 TU 6-port
1 Series
- F20 LCI 09/2015 to 06/2019 - M140i and M140ix
- F21 LCI 09/2015 to 06/2019 - M140i and M140ix
2 Series
- F22 09/2015 to 06/2017 - M240i and M240ix
- F22 LCI 09/2016 to 12/2019 - M240i and M240ix
- F23 09/2015 to 06/2017 - M240i and M240ix
- F23 LCI 10/2016 to 12/2019 - M240i and M240ix
3 Series
- F30 LCI 10/2014 to 10/2018 - 340i and 340ix
- F31 LCI 10/2014 to 06/2019 - 340i and 340ix
- F34 GT LCI 09/2015 to 12/2019 - 340i and 340ix
4 Series
- F32 04/2015 to 02/2017 - 440i and 440ix
- F32 LCI 05/2016 to 12/2019 - 440i and 440ix
- F33 03/2015 to 02/2017 - 440i and 440ix
- F33 LCI 05/2016 to 12/2019 - 440i and 440ix
- F36 Gran Coupé 03/2015 to 02/2017 - 440i and 440ix
- F36 Gran Coupé LCI 05/2016 to 12/2019 - 440i and 440ix
X Series
- X3 G01 10/2016 to 07/2019 - X3 M40ix
Part numbers
- BIGBOOST-EFR-8374
- BIGBOOST-EFR-8474
- BIGBOOST-EFR-9174
- BIGBOOST-EFR-9280
Why buy from Nforcd
We supply, install and support BigBoost B58 turbo upgrades in the UK, and we have first-hand experience with these kits on customer cars. Fitment, drivability and power delivery are exceptional, and feedback from our B58 community has been consistently positive.
Professional fitting and support
We recommend professional installation and a bespoke calibration. For fitting at Nforcd in Warwickshire or to request a quote, email Sales@nforcd.com.
Search-friendly terms
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Manufacturer
BigBoost