You can get 220hp out of a type IV for a lot less $...I prefer to stay with the light weight 912 engine since I'm an auto cross addict. I beat most cars with fat butts. My car weighs in at only 1960 lbs with 1/2 tank of gas hard to get that out of bigger engines. That's a ton of $ to get only 20 more hp IMO...looks very nice though. I've also seen type I engines in 912's kick some serious butt....