Nforcd B58 450 pack

Circa 450 bhp upgrade kit for the BMW turbo straight six

Want noticeable, reliable performance gains from your BMW 3.0‑litre turbocharged six without sacrificing drivability? This proven performance bundle delivers around 450 bhp with a strong torque increase and OEM‑like smoothness. Supplied and fitted by MJ Modifications in Warwickshire, it is a no‑nonsense route to serious pace and everyday usability.

What is included

• Professional installation included in the price
• Stage 2 Plus ECU calibration for powerful, consistent results
• Catless downpipe included for maximum flow
• All required sealing hardware and gaskets
• TU‑spec high‑pressure fuel pump upgrade for rock‑solid fuelling

We have installed this setup on multiple customer cars and the feedback has been excellent. Sharper throttle response, faster spool, stronger mid‑range and a top‑end that keeps pulling. Real‑world tested, refined and ready.

Optional add‑ons to tailor your build

• Osprey Intake V1 / V2 / V3
• High‑flow drop‑in panel air filter
• Osprey 4.5 inch heat‑shield catless downpipe
• Osprey 5 inch catless downpipe
• Osprey 5 inch Super Sport catalyst
• Osprey 4.5 inch Sport catalyst
• Bespoke calibration for specific hardware or fuel
• Dyno session for verified power figures
• Alternative high‑pressure fuel pump options

Why choose MJ Modifications

• Specialists in BMW turbo straight‑six tuning and hardware upgrades
• Supply and fit service from our Warwickshire workshop
• Customer‑approved results and aftercare support
• Clear advice on the best combination of induction, exhaust and fuelling for your goals

Book your install

Ready to transform your car with a strong, dependable power increase? For pricing on optional parts or to arrange fitting at MJ Modifications in Warwickshire, request a quote at info@mjmodifications.co.uk.

Good to know

• The listed price covers supply, installation, ECU calibration, catless downpipe, required gaskets and the TU high‑pressure fuel pump. Optional items are extra.
• If you are unsure about suitability for your specific 3.0‑litre turbo straight‑six platform, contact us for guidance.
• Catless and certain exhaust components may be intended for off‑road or motorsport use where applicable.

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