I have read that with the headers and exhaust, one can gain between 15-25 rwhp, but lose 0-60 times by 0.5 sec and 1/4 mile quickness time by 1 sec. I have also read that this gain in rwhp is spread throughout the powerband making for wider powerband and higher top-end. Are these things true? Short of Turbo, SC, or NO2, what are some things I could consider doing to get that "off the line" quickness back or beyond without cutting off the top-end?