Hi have a 1999 2.2 NA vehicle. I'm looking to purchase new injectors. I was looking at the injectors from a newer model vehicle. Will a 2000 design injectors be compatible with my vehicle. I was also wandering what size injectors would give a naturally aspirated engine more torque. I mean what kind exactly, from what year car, engine size etc. Thank-you.

They won't give you any gain in power. They are a supporting mod not a power mod.