Yes you would need the manifold/downpipe aswell.

Along with TIP/MAF, better intercooler, either SMIC's or FMIC

You'd need the LCR 380cc injectors aswell! There's some other bits and bobs like water/oil lines etc but i think thats about it!
 
just searching for 'lc k04' returned 500 results, 2 of which in the first 50 answered your question.