Will this work in my 1981 ford bronco with the straight 6 cylinder 300 cid 4.9 l engine?

I doubt this model number would give you the best performance. This is on a four cylinder tractor motor. Check the Flame Thrower site for the correct model number.

When installing this with the Pertronix ignitor, do you have to bypass the resistance wire? if you don't does it damage the coil?

I have the resistance wire hooked up with mine, if not you might burn out you coil and cause injury to your Pertronix ignitor. If you are building your own system I would put in a resistor or if you don't have a resistor I would add one.

Will this work for everyone ?

It should work for a 6volt system that is a 12volt vehicle that uses a ballast resister to drop the volts with out using the resister

Will this coil work with a 61 Ford Pickup 312 engine?

It will certainly work with the PerTronix ignition installed. If it has the same resistance as the OEM coil, no problem working with the stock system. Check out the .pdf on the PerTronix website for the resistance of the 40611 coil. You may need to remove the existing ballast resistor, or add one., depending upon the spec.

Pertronix 40611 Flame Thrower 40 000 Volt 3 0 Ohm

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Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite Performance, Own the Road!

BUILT TO ENDURE - Oil-filled for superior heat dissipation or epoxy-filled for rugged vibration resistance.
ELECTRIFY YOUR RIDE - Delivers a blazing 40,000 volts for larger spark gaps and enhanced engine power.
PLUG PLAY SIMPLICITY - Internally resisted coil means hassle-free installation with minimal wiring.
UNIVERSAL COMPATIBILITY - Fits multiple vehicle types and works seamlessly with inductive ignition systems.
SMOOTHER DRIVE BETTER ECONOMY - Optimizes spark efficiency for smoother throttle response and improved fuel economy.

The PerTronix 40611 Flame-Thrower ignition coil delivers a powerful 40,000 volts output with a 3.0 ohm internal resistance, designed for universal fit on inductive ignition systems. Available in oil-filled or epoxy-filled variants, it ensures superior heat management and vibration durability, making it ideal for both street and off-road vehicles. Its internal resistance simplifies installation, while its high voltage output supports larger spark plug gaps for enhanced engine performance and fuel efficiency.

Specifications

ASIN	B000N2XOYE
Automotive Fit Type	Universal Fit
Best Sellers Rank	24,934 in Automotive ( See Top 100 in Automotive ) 34 in Car Ignition & Heating Systems
Brand Name	Pertronix
Compatible with Vehicle Type	Multiple vehicle types
Connector Gender	male
Customer Reviews	4.5 4.5 out of 5 stars (482)
Global Trade Identification Number	00694342004903
Included Components	All parts
Installation Type	Screw-In
Item Type Name	Ignition Coil
Item Weight	680 g
Manufacturer	Pertronix
Manufacturer Part Number	40611
Model Number	40611
OEM Equivalent Part Number	40611
Part Interchange Info	[Interchangeable with certain ignition systems]
UPC	694342004903 685228713675 826732084213
Unit Count	1.0 count

Reviews

I**E

Very poor packaging

The coils are very good but the delivery method is atrocious, tried to return item but would only refund one item. Do not buy these from here. One star is far to high.

21.07.2023

S**Z

Muy buen producto, buena Chispa y potencia

25.08.2021

M**E

Fine

2.07.2025

A**ー

装着して5ヶ月で、端子が折れてレッカー呼ぶ羽目に…、70KMほどしか走ってないのに、残念です。

18.10.2025

R**R

Makes engine run smoother. Better than standard coil. Slightly more bottom power. Reduces or eliminate hesitation when pulling up.

2.05.2021

M**N

still works great on my old ford 800 series!! wow been 2 years nearly!!!! I also got compatible spark plugs and compatible spark plug wires to compliment this coil!!

26.09.2025

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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The product quality is outstanding. Exactly what I needed for my work.

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