I have it on my 14 m920 and a buddy has it on his stock 13m8, we both run it off the vipec, mine is the 50 shot and his is the 30, both work great, I gained 8 to 10 mph track speed on a climb. I know a few guys that ran it on the 18 cats with the power commander with great results as well....if I was going to do one engine mod to my new alpha this would be it.