SETES BMW N55/S55 to B58 Coil Conversion Kit

B58 Coilpack Ignition Upgrade for BMW N55 and S55 Engines

In N55 and S55 engines, misfires and unnecessary timing correction are often the first limitations encountered when increasing power. Upgrade your ignition system with the SETES B58 Coil Conversion Kit, engineered in Finland. This premium plug-and-play solution allows you to install high-performance OEM B58 ignition coils in your engine—no soldering, trimming, or permanent modifications required.

Why Upgrade?

• Helps eliminate ignition-related issues, such as persistent misfires in tuned engines
• Enables the use of latest-generation OEM B58 ignition coils for improved reliability
• Delivers a stronger, more stable spark—ideal for high-performance setups
• Reduces timing pull caused by weak or inconsistent ignition

What’s included in this kit:

CNC-machined billet aluminum brackets for precise, secure fitment
Custom plug-and-play wiring harness compatible with factory connectors
Custom ignition coil boots

How to Upgrade?

No cutting, soldering, or wiring needed – this is a 100% plug-and-play upgrade. In addition to this kit, you’ll need a set of B58 coilpacks of your choice. We recommend either OEM B58 coils or reinforced versions such as Dinan. For spark plugs, a great match for x55 engines is the NGK SILZKBR8D8S (see related products).

• Easy plug-and-play installation – swap like your original coilpacks
• Compatible with both OEM and aftermarket B58 coils
• Pair with high-quality spark plugs such as NGK SILZKBR8D8S for optimal performance

Instructions

-> Download the N55 to B58 coils set installation manual in PDF file.

Perfect for tuned builds and high-boost applications, this upgrade delivers a stronger and more consistent spark. The result: cleaner combustion, fewer misfires, and reliable support for higher power levels.

Examples of compatible vehicles:
BMW M135i F20 / F21
BMW M235i F22 / F23
BMW 335i F30 / F31 / E92
BMW 435i F32 / F33 / F36
BMW 535i F10 / F11
BMW 640i F06 / F12 / F13
BMW M2 F87 (N55 / S55)
BMW M3 F80 (S55)
BMW M4 F82 / F83 (S55)
BMW X3 M40i (N55)
BMW X4 M40i (N55)