I just put a 74 in my NA and really like it. The only issue I've had is when it's cold, the engine, and when it upshifts to second there is a big stutter where it feels like it doesn't want to shift, then letting off the gas it shifts normally and never happens again. When the engine is warm it's fine. doesn't do it, so I'm thinking it's more of a MAF issue. Lots more low end pull. No codes being tossed at all.