In theory, yes. It only takes money. If your 318i is the single cam motor. Then you need a motor transplant. i.e. the M42, which was the road going block. You could then bolt most of the performance bits straight onto that block. The 'S' on all BMW block denotes it is the performance version. For example, an E30 M3 has an S14 block. There are 200 road going 318iS with the S42 block somewhere.
Thanks, thinking of taking it off tho . . too many people calling me a fake wannabe
what the hell? its on an amp not ur engine or trunk lid. it looks kool so why take it off? until you put an ///M badge on ur trunk ur not a "fake wannabe" , i bet u a $1 that there only saying that cause u have a better car than they do