Pure Turbos Pure850 Hybrid Turbo Upgrade for BMW B58 F-Series | M140i M240i 340i 440i (F

Pure850 Hybrid Performance Turbocharger for BMW B58 F-Series

Unlock serious, reliable power from your BMW 1 Series, 2 Series, 3 Series or 4 Series with the Pure Turbos Pure850 hybrid. This direct-fit performance turbocharger is the go-to choice for B58 enthusiasts who want strong mid-range punch, huge top-end, fast response and factory-style manners. It is a proven stage-two, bolt-on solution that retains OE-style fitment while delivering the headroom you need for road, track and fast-road builds in the United Kingdom.

We run these units on customer builds and the feedback is consistently excellent: rapid spool for the size, repeatable numbers, and drivability that feels OEM-plus. If you are searching for a B58 big turbo, uprated turbocharger for M140i, performance turbo for M240i, 340i hybrid turbo, or 440i power upgrade in the UK, this Pure850 is the benchmark.

Real-world performance

• Around 530 whp on 98 RON pump fuel with the right supporting hardware
• Circa 600+ whp potential with an upgraded high pressure fuel pump, E40 to E50 ethanol blend and water-methanol
• Strong response for a hybrid unit, targeting roughly 20 psi by about 3,200 rpm

Figures vary with calibration, fuel quality, environment and supporting modifications.

Why Pure850 for your B58

• Direct-fit, stock-location performance turbo for the B58 platform
• OE-like drivability with huge headroom for power
• Ideal for fast road, track days and high-performance street builds
• Trusted worldwide, widely used across F-series B58 applications

Core engineering

• Custom billet compressor wheel for efficient airflow
• Optimised turbine wheel for high-flow exhaust performance
• Precision CNC machined components
• High-speed VSR balanced for durability and smooth operation
• Robust cast housings designed for OEM-style installation

Ordering and core exchange

This is a trade-in upgrade. Send your non-damaged stock B58 turbocharger core and Pure Turbos will build it to Pure850 specification. Please send only the bare core assembly. Any extra parts included may not be returned.

Cannot send your core first? A refundable deposit option is available so you are not off the road. Get in touch to arrange the deposit and return process once your original turbo is removed.

Professional fitting and mapping

Installation and ECU calibration by specialists are strongly recommended for best performance and reliability. For expert fitting in Warwickshire, choose MJ Modifications. Request a fitting quote or core-deposit arrangement by emailing info@mjmodifications.co.uk.

Vehicle compatibility

For BMW F-series models with the B58 engine:

• 1 Series M140i — F20, F21
• 2 Series M240i — F22, F23
• 3 Series 340i — F30, F31
• 4 Series 440i — F32, F33, F36

We verify fitment before dispatch

Provide your UK registration or the last seven digits of your VIN at checkout and we will confirm compatibility prior to shipping.

Part number

PUR-TUR-B58-010

Manufacturer

Pure Turbos

Warranty

1-year manufacturer warranty.

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