AVS2 compared to Street Demon?

I agree with Rusty, It's a apples to apples comparison.They are both good,so good you wouldn't go wrong with either.

That's what I was afraid of. I guess it's not a bad thing though.
I've convinced myself that until I go to aftermarket heads, the 625/650 size will suffice. I don't want to risk the off-idle and part throttle response by going too big at this point. Not having to mess with a bunch of tuning is appealing too.