Nexsys N55/S55 || B58 Coil Conversion Kit

BMW N55 & S55 B58 Ignition Coil Conversion Kit – Plug-and-Play High-Performance Upgrade

Upgrade your BMW N55 or S55 ignition system with our premium B58 Ignition Coil Conversion Kit. Designed with performance, reliability, and ease of installation in mind, this kit is a direct plug-and-play solution that delivers over 2x the energy output of stock coils—without the bulk or complexity of traditional setups.

🔧 Now Shipping with a 5-Day Lead Time
We are actively processing orders daily—get your order in now and expect shipping within 5 business days.

💥 Why Upgrade to B58 Ignition Coils?

Compared to factory N55 and S55 coils, the B58 ignition coils in this kit produce:

• ⚡ 2.3x Higher Energy Output

• 🔥 Longer Spark Duration

• 📏 Better Spark Efficiency for High-Boost Applications

• 🚫 No Need for Additional Spark Plug Wires (true coil-on-plug design)

⚙️ Engineered for Clean Fitment & Easy Installation

This B58 Coil Conversion Kit was purpose-built for the BMW N55 and S55 engines, using:

• ✅ Plug-and-Play Nylon Harness – No cutting, splicing, or guesswork

• ✅ Billet Aluminum Coil Brackets (Made in the USA) – Lightweight & durable

• ✅ Custom Long Ignition Coil Boots – Ensures proper plug contact

• ✅ Low-Profile Fitment – Maintains clearance for top-mount turbo setups

• ✅ Stock Engine Cover Compatible – Retains a factory-clean look

The entire kit weighs just 3.0 lbs with coils installed—over 50% lighter than comparable kits like Precision Raceworks.

🔩 What’s Included in the Kit

• 3x Billet Aluminum Coil Brackets (CNC machined, Made in the USA)

• 6x Extended-Length Ignition Coil Boots

• Plug-and-Play Connector Harness (Optional, USA-made nylon & assembled in-house)

• [Optional] Set of B58 Coils – Sold separately or as a bundle
  👉 Pair it with our B58 Ignition Coils – Click Here

🔧 Vehicle Compatibility

• BMW N55 Engines

  • F30 335i / 340i

  • F22 M235i / M240i

  • F32 435i / 440i

  • F87 M2 (N55)

  • X Series with N55 engines

• BMW S55 Engines

  • F80 M3

  • F82 / F83 M4

  • F87 M2 Competition (S55)

🚗 Why Choose Our Kit?

• 🇺🇸 Proudly Designed & Assembled in the USA

• 🧩 True Plug-and-Play Harness = Zero Wiring Hassle

• ⚙️ Performance-Oriented, Track-Tested

• 🧽 Engine Cover Compatible for OEM Aesthetic

• 💪 Ideal for Stock or Modified Builds

📦 Order Today – Limited Quantities Available

Whether you're battling misfires or building a high-horsepower street car, this kit ensures consistent spark delivery, better combustion, and improved ignition reliability. Upgrade your BMW’s ignition system with confidence.

🕔 Lead Time: 5 Business Days
All kits are assembled and quality-checked before shipping.

🛒 Add to Cart Now

Boost your spark, reduce weight, and streamline your engine bay with this premium B58 Ignition Coil Conversion Kit for your N55 or S55-powered BMW.