Pertronix Flame-Thrower 40,000V Ignition Coil, Black Canister — 12V High-Output, 3Ω Primary

The PerTronix Flame-Thrower Ignition Coil 40511 is a 12-volt, oil-filled, high-output coil that delivers up to 40,000 volts for stronger spark energy and improved throttle response in electronic and points-style ignition systems.

This compact black canister coil is engineered to upgrade stock units and work smoothly with PerTronix Ignitor systems while remaining compatible with most conventional inductive distributor ignitions. Built with a 3 ohm primary resistance and oil-filled construction, it’s designed to handle repeated heat cycles and provide consistent spark delivery for street-driven vehicles when installed vertically with the terminal facing upward.

How will this coil affect engine performance?

The Flame-Thrower coil increases spark energy compared with typical factory coils, which can help more complete combustion under standard driving conditions. That stronger spark often translates to crisper throttle response, steadier idle, and improved ignition stability across RPM ranges.

• Up to 40,000 volts output for higher spark intensity
• 3 ohm primary resistance tuned for 12V inductive systems
• Optimized to pair with PerTronix Ignitor electronic modules
• Designed as a drop-in upgrade for many stock coils

Is this coil compatible with my vehicle’s ignition system?

The 40511 is intended for 12-volt inductive ignition systems and works especially well with PerTronix Ignitor electronic distributors. It remains compatible with many points-style and electronic distributors, but check physical fit and terminal orientation before purchase.

• Best matched with PerTronix Ignitor modules
• Works with most conventional inductive distributor setups
• Verify dimensions and mounting clearance for your application
• Not recommended for systems requiring non-oil-filled coils or different resistance values

What are the installation and orientation requirements?

This coil is oil-filled, so correct vertical mounting is essential to prevent leakage and protect internal components. Always install with the electrical terminal facing upward and secure the coil to a vibration-free bracket to maintain long-term reliability.

• Mount vertically with terminal upward—no horizontal or upside-down mounting
• Use proper brackets and hardware to minimize vibration
• Confirm wiring compatibility and correct polarity during installation
• Follow vehicle and PerTronix Ignitor installation guidelines

Will this coil handle daily driving heat and load?

The oil-filled canister design helps dissipate heat and supports consistent spark delivery during normal street driving. While built for reliable everyday use, proper installation and correct system matching are important to realize steady performance under routine loads.

• Oil-filled construction aids thermal management
• Round canister shape promotes consistent spark output
• Suitable for street-driven vehicles with matched ignition electronics
• Not a specialized racing-only coil; designed for road reliability

Who is this for? The PerTronix Flame-Thrower 40511 is aimed at classic car owners, hot-rodders, and anyone seeking a straightforward, high-output replacement for a tired stock coil—especially when using PerTronix Ignitor electronic distributors or similar inductive ignition setups. If you need a durable, higher-voltage coil for everyday driving and you can mount it vertically with the terminal up, this coil is a practical upgrade. If your vehicle requires a different resistance, mounting orientation, or a non-oil-filled design, check specifications before buying.