Approx 40cc IIRC, plus approx 2cc valve-pockets in the pistons.
SCAT Wedgeport 44x37.5 with 15.1mm lift.
No idea on how much torque it's producing, but it was enough to take out my R/P while accelerating in second gear while jetting it.
Here's a vid with fan belt + restrictive muffler..
https://www.youtube.com/watch?v=IQ7fvreQoxkVid of when I broke the R/P.. (2:03)
https://www.youtube.com/watch?v=XKQBJki0qdc