Davis Unified Ignition
Manufacturer of ignition products for a variety of cars.
http://www.performancedistributors.com/

Rapair, Inc.
For more than 25 years, CDI Electronics has provided value and lowest cost of ownership by supporting the marine and motor sport industry. Our commitment is to continue to be the proven solution provider. We also believe it is our duty to train the marine industry to diagnose and install ignition products. See our training and Service areas to learn more. Our products are Designed and Manufactured in Madison, Alabama.
http://www.rapair.com

MSD Ignition
Your performance electronic source for ignitions, coils, distributors, alternators, timing controls, lazer gauges, spark plug wires, starters, fuel management, data acquisition and tuners.
http://www.msdignition.com/

Murphy Power Ignition
Manufacturer of processor-based, capacitor-discharge ignition systems for spark ignited natural gas powered engines.
http://www.murphy-pi.com/

Westwood Products
Westwood Products has oil burner parts, Auburn electrodes, ignitors, flame rods, Rajah transformer & ignition terminals, Tigerloop oil de-aerators, pump testers, Nylo-Flex motor couplings, Spiralink circulator couplings, oil filters, elements, spin-ons, braised plate heat exchangers, heating oil fuel additives treatments, solid state igniters, cad cell eye flame detectors, Brigon combustion analyzers.
http://www.westwoodproducts.com/

HowStuffWorks: How Automobile Ignition Systems Work
The ignition system brings your car’s engine and subsystems together. Learn about the parts of your ignition system and innovations in ignition systems.
http://www.howstuffworks.com/ignition-system.htm

University of Wisconsin-Madison - Engine Research Center
Conducts research on spark ignition and compression ignition engines. Includes facility information, publications and results.
http://www.erc.wisc.edu/

Southwest Research Institute - Spark Ignition Engines Project Brief
SwRI has capabilities for and experience with the following types of SI development projects: Alternative fuels, Durability, Hot/cold environments, Altitude testing, Electronic controls, Ignition systems comparisons, Engine benchmarking
http://www.swri.edu/4org/d03/engres/spkeng/sprkign/pbeffimp.htm

Skytronics Inc.
Manufacturer of Jasco ballscrews, alternators and ignition harnesses.
http://www.skytronicsinc.com/

Harbin
Manufacture ignition coil, speed sensors. From China.
http://www.beter.com.cn/