i speculate these types of gains would need to be tuned on a dyno. are you guys using a generic ECU program from a tuned car to yield "expected results", or do you actually read the stored fuel map, and tuned based per ECU.

if it's the later route, this is a pretty good deal for custom tuning, because it wouldn't be limited to stock hardware (exhaust, cams, intake etc), however it stil lwouldn't produce the optimum results as being tuned on a dyno.