I've got a 1987 concord magnum II 20 ft boat. I just built a SBC that is around 385-400 horsepower. I currently am running a 21 p laser II and turning it to 5200 rpm at about 62-63 mph gps. I tried one of your 21 m+ demo props and it killed my rpm and speed. The boat seems to really like the laser so I was wondering if maybe a you had a labbed 23 laser I could demo to see if it will turn 5200-5400 rpm and pick up a few mph.

Hello,
We have very few Labbed propellers in our test program for many reasons. Some obvious and others are not obvious (too many Lab recipes).
Call us, maybe the 23 stock Laser 2 is a possible option but it looks like working your current pitch is the only way to get to 5400 if this is you goal.

Brett