2002 BMW M3 'LS Swap'

There are few motors more loved than the S54 that came in the E46 M3, but its Achilles heel was that it came pretty well maxed out from the factory (this side of adding a turbo), leaving little room for modification. Enter the most tunable motor on the planet – the LS1, which is what is hiding under the hood of this sleeper M3. Power figures aren’t quoted, but it wouldn’t be difficult for the LS1 to double the output of the stock motor.