Originally Posted by mike85-325e
other than injectors wut would give me the biggest gains? m30 afm? already considering the Markd chip.
The M30 AFM is another one of those mods that doesn't really work well. I'm not really sure how to get power out of a 91 318 4cyl engine, but you don't want to be swapping on any 6cyl engine parts as they will be completely wrong for your engine.