I agree, you might as well save your money if your car is n/a, now if you have FI then the gains are noticable with a ported head from what I've heard. Tom ported and polished my svt head, actually i bought the complete engine from him, an we're still in the process of tuning it, I just need to get the wideband in. But I'll let you all know how it feels once we've completed the tuning.