gt350's right, usually bigger injectors are needed when serious power is being made, head work, big cam durations and overlap, forced induction, sometimes for safety reasons like the use of nitrous, or high reving motors, but l don't think he'll lose much if anything with somewhat bigger injectors, he might lose a little down low like gt350 said, but if he's looking to do some upgrades in the future theyre a good start
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