The 4 cylinder Toyota 20R and 22R are two of the most popular trucks ever produced. The new D.U.I. (Davis Unified Ignition) is the ultimate ignition for these applications. Produced from 74-89, these trucks need to be upgraded with today's technology, specifically the D.U.I. The D.U.I. is a one-wire, one piece distributor. No more messy wiring or points to worry you.

Due to the longer duration spark which the D.U.I. produces, you will be able to open up the plug gaps to a whopping .055". This burns the fuel more completely, leading to more power. Our Dyna Module is designed with more dwell time producing a hotter spark. No ballast resistor is used. Stock toyota systems and many aftermarket systems require a ballast resistor which reduces the voltage in the ignition system. Our D.U.I. allows FULL voltage into the ignition system, giving you a better spark and more power.
Because each D.U.I. is calibrated on a distributor machine with a very accurate advance curve, you should be able to increase your initial base timing from the factory setting of 0 degrees to 8 degrees. That will set you back in your seat fast!

The Toyota D.U.I. is a real work of craftsmanship. Although it is uniquely designed, replacement parts are easy to find. GM HEI replacement parts will fit right on the DUI and these parts can be found at your local auto parts store. The unit is polished and lubed as it is assembled. Built for durability, the D.U.I. has an upper and lower bushing, unlike stock Toyota distributors with only one bushing. An optional tach hookup is included with the D.U.I.

D.U.I. LiveWires:

LiveWires come with space age, heat resistant sleeving to provide protection from exhaust heat. The sleeving is heat treated glass braid and is non-flammable and non-corrosive to chemicals. LiveWires are custom fit - no assembly is required. Each wire is numbered at each end for the correct cylinder. LiveWires have a durable and long lasting silicone jacket and insulation. Spiral wound core prevents electronic interference - no radio noise or computer interference.

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PRIOR TO PLACING AN ORDER ONLINE

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