All 6 on my 90 NA failed. I'm looking to buy some and want to know some input on them. I am going to keep it NA but will upgrade. I am not planning on going hardcore engine upgrades such as boreing. I don't know anything about injectors but if i have a chance to upgrade something like that I will. Are 370cc injectors good on an NA? What else will I need to upgrade? If someone could help me that would be great. Thanks.