MST Performance BMW 3.0 S55 M2 M3 M4 Competition Turbo Inlet Kit

MST Performance BMW S55 Turbo Inlet Kit – M2, M3 & M4 Competition (MST-BW-M3402)

If you own a BMW M2, M3, or M4 Competition with the S55 3.0-litre twin-turbo engine, this turbo inlet kit from MST Performance is a straightforward and effective upgrade. It replaces the restrictive factory inlet pipes with larger, smoother-flowing silicone hoses, helping your turbos breathe more freely and respond more quickly.

What Does It Do?

The turbo inlet pipe is the section of pipework that feeds air directly into the turbocharger. The standard fitment on the S55 engine is designed with cost and packaging in mind, which means it can restrict airflow – particularly when the engine is being pushed hard. MST’s replacement kit uses an enlarged bore (wider internal diameter) to reduce this restriction, allowing a greater volume of cold air to reach the turbos more efficiently.

The result is improved turbo response – meaning the turbos spool up (build boost pressure) faster – and a noticeable improvement in throttle response. On a standard car this can sharpen the driving experience noticeably. On a tuned car, where the engine is already demanding more air, the gains can be even more pronounced.

What’s Included?

• MST Performance black silicone inlet hoses with enlarged diameter bore
• Full fitting hardware kit
• Step-by-step installation instructions

Quality & Construction

MST Performance are a well-regarded manufacturer in the performance aftermarket, known for producing intake and inlet products that offer genuine improvements without cutting corners on materials. The silicone hoses used in this kit are built to handle the heat and pressure demands of a high-performance engine like the S55, and are designed to fit cleanly in place of the factory components.

This is a bolt-on upgrade that does not require any permanent modifications to the vehicle, making it a popular first step for M2, M3, and M4 Competition owners looking to improve intake efficiency before or alongside other performance work such as a remap or exhaust upgrade.

Important: This kit is designed specifically for BMW M2, M3, and M4 Competition models fitted with the S55 3.0-litre twin-turbo engine. It is not compatible with the earlier N55 single-turbo engine or the newer S58 engine found in the G-generation M cars. Please use the vehicle lookup tool on this page or check the Vehicle Fitment tab to confirm compatibility with your specific model and build year before ordering.