MSD 5527 Street Fire Ignition Coil Ford TFI E-Core Red

The MSD 5527 Street Fire Ignition Coil is a direct bolt-on performance upgrade designed for 1983–1997 Ford TFI (Thick Film Ignition) distributor-based ignition systems. Built with an E-core square design and epoxy-filled construction, this coil delivers increased spark energy over the factory unit while maintaining full compatibility with your existing wiring and brackets.

Key Features:

• Direct Bolt-On Installation – Mounts directly in place of the factory coil and accepts OEM factory connectors with no modification required
• High Output Voltage – Delivers up to 48,000 volts of maximum output for a stronger, more consistent spark
• Epoxy-Filled E-Core Construction – Square E-core design with epoxy fill improves heat resistance and long-term durability
• Ferromagnetic Silicone Steel Laminations – Helps prevent power loss and ensures efficient energy transfer to the spark plugs
• Optimized Windings – Improved winding ratios (85:1 turns ratio) and upgraded materials increase spark energy and spark duration (250 µs)
• Low Primary Resistance – 0.440-ohm primary resistance and 5.5K-ohm secondary resistance for efficient coil performance
• CARB Compliant – Legal for sale and use on emissions-controlled vehicles in all 50 states (CARB D-40 to 43)
• Red Finish – Distinctive red coil body adds a performance look under the hood
• Sold individually

Specifications: Peak Current – 300 mA | Inductance – 7.0 mH | Coil Wire Attachment – Male/HEI | Coil Shape – Square | Internal Construction – Epoxy

The MSD 5527 Street Fire coil is an ideal entry-level performance upgrade for Ford, Lincoln, and Mercury vehicles equipped with a TFI distributor ignition. Improved combustion efficiency results in smoother idle, better throttle response, and reduced misfires — making it a strong complement to other bolt-on performance modifications.