they did 3 different versions of the escort si

105, 115 and 130bhp

i have a 105 model and the only difference between mine and the 115 and gti engines is the ecu and throttle body (the 105 spec having the same tb as the 1.6 zetec)

so if you have a 115 spec engine the difference from a gti engine is absolutely nothing

the 130 spec models came in the cabriolets