Ryan J got me 660 out of my small block and now with a vac pump and different intake I'll have more yet. Mine is a 4 spd street car and makes a pass for roughly every 10 miles of cruising it does. The smile on my face is permanently engrained- the power on hand is AWESOME- the throttle response is AWESOME. I can instantly destroy my street tires at will to the top of third gear but the tradeoff is now having to upgrade everything around it to survive if you plan on using the power with traction. It's a expensive tradeoff but I can't imagine going back to having less power. I wouldn't ever consider opening this thing up in town though- it's WAAAYYY to violent, things happen WAAAYYY to fast and it's WAAAYYY too much fun.