When I had mine mapped the increase in power was great but I have to be honest and say the MPG was no better or worse. So, more power - same MPG was a result. Think you just have to accept the fuel economy. The only time mine was good was on my way to getting it mapped when i had to stay off boost and stuck at 60mph on the M25!!. Boring as hell tho!
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10 Years of Scoobies:04 WRX SL, 06 HAWK STI, 97 JDM WRX STI WAGON, 05 WRX STI, MK3 FOCUS RS, now Porsche Cayman S
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