i have 95 dx w/ d15b7 engine/manual. i just have intake and header. i don't know if wires and sparks matter, but i have 10.3mm wires, and ngk iridium plugs. ok here's the problem. whenever i accelerate at any gear, it'd accelerate relativly slow, but after 3800 or 4000 rpm it'd start accelerate really fast. so i'm getting 0-40 slower than 40-60.... is tht normal? any idea 'd be nice....thank you