Pertronix Flame-Thrower Ignition Coil 40611 Black 40,000V — 3.0Ω Epoxy-Filled High-Output Coil

The PerTronix Flame-Thrower Ignition Coil 40611 is a high-output 40,000-volt, epoxy-filled 3.0 ohm coil designed to deliver strong, reliable spark energy for 12‑volt electronic and breaker-point ignition systems.

This compact, factory-style black canister coil is built to improve spark consistency and protect ignition modules and points by using a higher primary resistance. Engineered for both classic and upgraded distributor-based systems, it fits common coil brackets and offers flexible mounting thanks to its epoxy-filled construction. Whether you’re restoring a classic ride or updating an older ignition, the 40611 balances durable construction with straightforward compatibility.

How does this coil affect engine performance?

The Flame-Thrower 40,000V coil provides stronger secondary voltage for improved spark energy, which helps more complete combustion and steadier throttle response without changing your engine’s tune. By supplying higher peak voltage, it reduces misfires under load and supports consistent ignition timing across RPM ranges.

• Delivers up to 40,000 volts to the spark plug for improved ignition of the air/fuel mixture.
• Helps reduce misfires during acceleration and under load.
• Supports steadier idle and throttle response with consistent spark output.

Will this coil work with my ignition system?

The 40611 is optimized for breaker-point setups and PerTronix Ignitor I electronic units, and it is compatible with many inductive distributor systems that require higher primary resistance. Its 3.0 ohm primary rating helps limit current draw through modules and points, making it a safe upgrade for systems sensitive to low-resistance coils.

• 3.0 ohm primary resistance suitable for many distributor-based inductive ignitions.
• Works well with PerTronix Ignitor I and traditional breaker-point modules.
• Fits common OEM coil brackets and replaces many factory-style canisters.

How durable and easy to install is this coil?

The coil’s epoxy-filled canister resists vibration and shock, allowing secure performance in street and higher-vibration applications and enabling mounting in any orientation. The black OEM-style finish and standard mounting footprint make physical installation straightforward for most hobbyists and professional installers.

• Epoxy-filled housing increases vibration resistance and longevity.
• Mountable in any position—top, side, or inverted—for flexible placement.
• Black, OEM-style canister matches factory appearance for easy swaps.

What electrical characteristics should I expect?

Built as a 12-volt, 3.0 ohm ignition coil, the Flame-Thrower balances higher secondary voltage with primary resistance that helps protect ignition modules and breaker points from excessive current. This design reduces the risk of premature module or point wear while keeping spark energy high for reliable combustion.

• Designed for 12-volt systems with a 3.0 ohm primary winding.
• Higher resistance helps prevent overcurrent to modules and points.
• Delivers consistent high-voltage output suitable for a wide RPM range.

Who is this for? The PerTronix Flame-Thrower 40611 is ideal for classic car restorers, hot-rodders, and anyone upgrading distributor-based ignitions who wants stronger spark energy without complex electronics changes. Choose this coil if you need a direct-fit, durable replacement that improves spark consistency, protects ignition components, and preserves a factory-style look.