rebuilt my motor after busting a land and now on 7 psi it pulls hella harder than before on 7 psi. 15 psi its stupid. and thats with a small turbo. before 8 psi was 230 and 225 tq it feels way better now. so rods and pistons are worth the 600-1000 for the power. oh i have turbo cams too that helps.