hey guys i have a mint fiesta si mk3 and have just bought an esrt but it needs 2 much weldin done underneath so as i have the whole car im gonna drop the engine in my fiesta how much wrk is envolved and wht will i need ? like i said i have the rst so basically the gearbox, wirnig loom etc . etc any advice gr8ly appreciated

 

the engine fits. But the mfi has a very complex wiringloom... you need to cut the MFI (engine loom) off the loom from the ERST and get it in your Si. Only thing you probaly need to mod is the radiator to fit the intercooler...

also you need to modify the downpipe. And maybe the fueltank.

a easyer mod will be to fit a FRST engine. As it is straight swap.