S srhutch Legend East Sussex, UK May 9, 2017 #21 Mike6 said: I appreciate that but there must be a way to convert a 2005 2.5i into a 2005 2.5si. Mine has 192 bhp whereas the si has about 217 bhp. There cannot be that many differences. Click to expand... No, not possible as there was never a pre facelift 2.5si As said the engines are completely different M54 released in 2000 and N52 released in 2004. https://en.m.wikipedia.org/wiki/BMW_M54#/search https://en.m.wikipedia.org/wiki/BMW_N52
Mike6 said: I appreciate that but there must be a way to convert a 2005 2.5i into a 2005 2.5si. Mine has 192 bhp whereas the si has about 217 bhp. There cannot be that many differences. Click to expand... No, not possible as there was never a pre facelift 2.5si As said the engines are completely different M54 released in 2000 and N52 released in 2004. https://en.m.wikipedia.org/wiki/BMW_M54#/search https://en.m.wikipedia.org/wiki/BMW_N52
