he's looking at 300rwhp on the high side... 19's are at the last few percent of their duty cycle making 365 engine hp. 21/22 pink tops are ok but I'd skip em and go to 24's for a bunch of reasons.
Remember, the rating of injector volume is for a specific pressure. If you don't know what you'll need then you can have your tuner tell you. If you're using a handheld then you can leave some leeway in the tune for a 2nd injector slope and upgrade if you find they're sliding up close to 100% duty cycle at WOT.
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