hey question for all out there i just picked up a greddy blue box figure for 20 bucks can be one of those things if i use ok if i dont o well but here is my question i have a new greddy e-manige for my MR2 and reading the book it has all the fetures i need for the MR2 but im not really familiare with the blue box the car i might put it in is going to be my daily driver so i really couldent see spending another 600+ dollers for a second emanige unit, my question is dose it do anything else besides slow the injectors?? Is it worth installing it in to a mildly tuned civic?? and was it really worth 20 bucks.