[spenaroo]

check redlinegti.com,
for the gti its not in there head. there is a proven 10% power gain,
and there are obvious differences,
the car changes in how it idle, it idles higher on start up (varies revs like an rx7) then drops down,
the ecu is tuned to high octane so runs rough on normal unleaded
and its faster then the stock swift next to u. (but not the turbo car a k in front whooping the monaro)

but then the chip was bought through a forum member not ebay