The T3/60-1 is a popular upgrade for people with T3/T04's, but it's not for everyone. You shouldn't get it just because it's "huge." You have to be moving enough air to spool it. A typical 1.8L B series will not make usable boost below 3k RPM with a T3/60-1. It'll take a while for it to spool, but it'll hit harder when it reaches full boost up top. You can run a T3/60-1 on the street, but don't expect a quick spool. If you can live with that, then it's capable of a lot of power. It's really more suited for top-end power and 1/4 mile performance. For the street, a T3/T04E should be more than adequate, and still have a good amount of top end power. You might even want to go smaller, with like a straight T3 super 60.