Introduction
The BMW N54 engine (found in the 135i, 335i, 535i, Z4 35i) is one of BMW’s most iconic turbo engines. With its twin-turbo setup and strong internals, the N54 delivers huge tuning potential even on stock turbos. At RDM Performance, we supply proven, reliable hardware for everything from Stage 1 to high-power hybrid builds.
Stage 1 Upgrades (360–390+ bhp)
Stage 1 focuses on improving airflow, cooling, and reliability.
Typical Stage 1 mods:
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Dual cone intakes (DCI)
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Charge pipe upgrade (essential — OEM pipe cracks easily)
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Front mount intercooler (FMIC)
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Spark plugs (1-step colder recommended)
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Coils upgrade (Torefi B58 coils recommended)
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Catback exhaust optional
Benefits:
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Better throttle response
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More consistent power
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Stronger mid-range
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Improved turbo efficiency
Not sure which parts you need?
Message us with your registration number, power goal and budget and we’ll spec the right setup for you.
Stage 2 Upgrades (400–450+ bhp)
Stage 2 allows the N54 to reach its full potential on stock turbos.
Typical Stage 2 mods:
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Catless or sports downpipes
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Larger front-mount intercooler
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Upgraded charge pipe + boost pipe
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Performance intakes
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Upgraded plugs & coils
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ECU tune (MHD / JB4 / BM3)
Benefits:
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Massive torque increase
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Fast spool
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Strong and reliable street performance
Not sure if Stage 2 is right for your setup?
Message us with your registration number, current mods and power goal and we’ll advise the best next step.
Stage 2+ / Hybrid Turbo (500–650+ bhp)
The N54 handles hybrid turbos extremely well. This is where the engine truly shines.
Typical Stage 2+ mods:
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Hybrid turbos
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Upgraded inlets 2”
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Outlets upgrade
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Larger intercooler
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Upgraded LPFP / HPFP
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Port Injection or Meth Injection (optional but effective)
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All supporting bolt-ons
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Custom tune
Expected power: 500–650 bhp (depending on turbo and fuel)
Hybrid and big-power setups vary from car to car.
Message us with your registration number, turbo choice and power goal for a tailored recommendation.
Recommended Brands
We supply all major N54 tuning components:
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VRSF
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RDM Performance Turbos
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RDM Performance own brand
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TMT Custom Tuning
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NGK
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Eldor
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Torefi Coils
Expected Gains
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Stage 1: +40–70bhp
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Stage 2: +70–110bhp
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Hybrids: +150–280bhp
Why Choose RDM Performance?
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Specialists in BMW tuning platforms including N54, N55, B58, S55, S58, B48 and more
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Fast UK delivery with reliable shipping and real-time order updates
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Carefully selected brands that we trust and use on our own vehicles
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Clear, honest advice — no upselling, no pressure
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Proven power upgrade paths with safe, reliable recommendations
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Excellent customer support through Instagram, WhatsApp and email
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UK-based business focused on quality, value and customer satisfaction
Disclaimer:
All performance figures are estimates and will vary depending on vehicle condition, supporting modifications, fuel quality, tuning software and installation quality. Some upgrades, such as decat downpipes, are not road legal in the UK and are intended for off-road or track use only.RDM Performance uk ltd is not responsible for any mechanical issues that arise from improper installation, aggressive tuning or pre-existing vehicle faults.For best results, always use a reputable tuner and ensure your vehicle is well-maintained.
