i have a 2004 j/b rex. JDM sti up pipe, injen catless down pipe, helix catback exhaust, tein s-tech springs, and a reflash. but i dont know if the reflash is working completely or whats going on, because my car feels a little bit slower then it is supposed to be. so i am a little bit confused. any one have any ideas? or what to do now?

 

uhhh, pretty vague post there bud. Please be more specific if you want some timely resonses. Setup, dyno, etc... who what when where & why type stuff.