I got them from a place called Wicked Diesel. They are made to run with higher timing(I don't remember what the spray angle is) I put them in when I was running 20deg, and they hazed a bit but pulled very well from right off the bottom. I never ran them on the dyno. I don't need larger injectors with this new pump so I'm selling these. I was at around 720hp or so with the M7's with my 12mm pump. The 6x16's were stronger.