Variables: * miles on engine ? * list of current mods * list of mods you plan to do at the same time as turbos * daily driver? Summer car? Weekend all year round car? * what gas will you use? 91? 93? E85 * Do you know your current rwhp/trq? Do you have a dyno? * Do you know your compression? * Budget in total for parts and labor? * Budget in total parts to purchase? * Do you plan for any higher rwhp in the future? Or is 450 rwhp your limit and. O intention to go higher in future?