most people go with rx7 injectors.
i put some prode/mx3 injectors in mine (2.2l).
just keep in mind, bigger injectors want do much, unless you got an aggressive cam, turbo, better feul pump, or intake goodies.
i just have a cone filter, and a better flowing muffler, and i can bearly feel the 2.2l injectors. and if i went bigger it would just flood the motor with too much gas.
Rx7 injectors are fine for a 1.8, but the wrong impedance for a 1.9.
It's a waste of time and money to go to larger injectors with only bolt on's.
You either need major head work, N2o, Turbo or SC to actully exceed what the stock fuel system can put out.
Adding fuel with out air can decrease power.
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