8-12 seconds!? You're going to need A LOT more mods for that. Turbo, engine build, tranny...etc.
I don't have the 4 cylinder but when i put my headers on it was a big difference. I already had an intake and exhaust on it so when those headers went on it complemented them VERY nicely. I suggest doing intake, exhaust THEN header....you 4 cylinder guys are lucky....that header is cake to put on....try doing headers on a 6....you will never do them again
