they can make good power, low 400s, they are just lazy turbos. boost comes in slow(compared to a DBB turbo) and the torque spike is pretty abrupt, because its lazy. but as long as you have a good rpm range and can keep the turbo spooled between gears (honda flatfoot shift will do it) then youll be fine with it. its just the out of boost, into boost transition that the 57trim is odd. alot of cars have surge issues with them which usually will make the 50 trim, or 60trim a better choice.