What kind of HP gains do you see with this Turbo XS Utec unit. 3" exaust up pipe down pipe, 18psi. also what is needed for the proper set up and tuning the Utec and seeing your perameters. Is an EGT gauge needed? and how much will this improve my 1/4 mile time? i havnt ran a 1/4 mile yet, but i am just curiouse on what people are running for times without the utec then installing the Utec what the diffrence was.