Okada Project Plasma Coil

Plasma Direct (PAT)A Revolution in Ignition Technology! The Plasma Direct technology is built in to the coil over plug system, used on many modern cars like BMW, Audi, VolksWagen, Honda, Totota, Subaru, Mitsubishi and many more. All your need to do is change the ignition coil to one of our perfectly fitted replacement coil and you are DONE

The Plasma Direct system improves spark energy over factory coilover plug applications and has been proven successful in numerous vehicles campaigned in time attack and Super Lap Battle race events throughout Japan. One example is the ultra-competitive M-Speed R34 GT-R, which battled against Japan's elite tuner cars at the season finale time attack in December. The M-Speed Skyline, equipped with the Okada Project Plasma Ignition, dominated the circuit and took the title of '07 Tsukuba Time Attack champ as the canary yellow GT-R blasted an amazing 54.4 seconds at the Tsukuba circuit.

Plasma Direct is a factory replacement ignition coil system that uses a high-power amplifier built into the unit to increase secondary spark current by 100 percent-two times as much as OEM. The system produces four times more spark energy for the initial spark discharge than the average stock coils while also generating a highly effective multi-spark discharge of 10 sparks throughout the powerband. Compared to the factory coil that delivers a single-spark discharge, the Plasma Direct's multi-spark discharge and improved spark energy yields improved ignition and greater combustion efficiency, all of which is beneficial for those driving high-horsepower vehicles.

Okada Coil Packs Dyno on S13

http://www.turbomagazine.com/tech/0805_turp_okada_coil_packs/okada_projects.html
Believe it or not, many aftermarket ignition coil packs are sold with a higher voltage range in comparison to most factory systems, which use a range of 300 volts to 400 volts. These aftermarket systems increase the payload to a whopping 450 to 500 volts, which can cause an ignition overload and net you with a crispy disaster. Not only do many of these ignition units bump up the voltage, they also produce negative current spikes of -30 amps to -40 amps, which will eventually lead to killing the coils due to its excessive negative current. Not all is lost with high voltage systems, though, these ignition units that often advertise how many mill joules and volts they deliver are considered ideal for drag racing, which demand high rpms during short intervals, but show limitations in performance gains within the midrange and lower rpm due to an overload in voltage and short lifespan of components. Damaging the factory ignitor on vehicles such as the BMW, which inconveniently integrates the unit within the factory ECU, will set you back a hefty chunk of change.
Primary voltage on a factory coil is anything but efficient for a high-performance vehicle showing only one spark.
The Okada Project Plasma Direct system requires no splicing or cutting into stock wiring; Simply replacing the stock coil with the Plasma Direct system and re-plugging the harness wires onto the new unit is a simple one-two process. And the best part you ask? All Plasma Direct components are OBD II compliant and C.A.R.B. approved which means you can give your local smog tech and friendly cop the finger while you rock your new Plasma Direct ignition system.

Subaru dyno results show promising horsepower and torque numbers for the boxer engine using the Plasma Direct coil packs.
http://www.importtuner.com/reviews/parts/0709_impp_okada_performance_ignition_coils/index.html
Here's a step by step coil install on a Yaris 1nz-fe:
http://bruneicompacttuner.heavenforum.com/performance-f1/okada-plasma-coil-upgrade-t15.htm#21