Introduction
The S58 (found in the G80/G82 M3/M4, X3M, X4M) is one of BMW’s most advanced twin-turbo engines. It responds massively to tuning while remaining very strong and reliable when upgraded correctly. At RDM Performance, we supply proven hardware for fast road and track applications.
Stage 1 Upgrades (540–600+ bhp)
Perfect for owners wanting safe, reliable gains without major hardware work.
Typical Stage 1 mods:
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Performance air filters / air intake
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Charge pipes & J-pipes upgrade
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Cold plugs
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Catback exhaust (optional)
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ECU tune (BM3 / MHD / Ecutek)
Benefits:
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Sharper response
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Stronger mid-range torque
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Improved turbo efficiency
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More consistent performance
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 (600–700+ bhp)
Stage 2 unlocks the full potential of the stock turbos.
Typical Stage 2 mods:
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Sports cat or decat downpipes
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Upgraded heat exchanger
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Performance intakes
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Upgraded charge pipes
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ECU tune (Stage 2 OTS or custom)
Benefits:
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Massive torque increase
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Lower intake temps
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Faster spool and smoother delivery
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Good for fast-road / track
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.
Hybrid Turbos / Stage 3 (750–1000+ bhp)
The S58 platform supports huge power safely with the right setup.
Typical Stage 3 mods:
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Hybrid turbos
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Upgraded HPFP
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PI (Port Injection) or upgraded DI injectors
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Larger intercooler / heat exchanger
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Meth injection optional
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Full supporting mods
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Custom tune
Expected power: 750–1000bhp depending on turbo and fueling.
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 stock trusted hardware for S58 builds:
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VRSF
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RDM Performance Turbos
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MST
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Torefi sport
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Forge Motorsport
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Torefi coils
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Genuine BMW parts
Expected Gains
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Stage 1: +60–100bhp
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Stage 2: +100–150bhp
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Hybrids: +200–400bhp
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
BMW S58 TUNING & PERFORMANCE PARTS
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.
