what engine would be good to throw in my car, 2001 mits. mirage 2dr 1.8l, or what can i do to my sohc 1.8l right now its got at least 140hp. and all i have done is intake(injen), exaust(custom): magnaflo hi-flo cat. 2.5" piping all the way back with a tip on it. megan yes megan not mugen 4.2.1 header. i want more $#@%! thank you.