If you plan on going over 1.5bar with the k04-02x, you WILL need rods; I speak from experience :)
I did: k04-02x, S3/TT manifold, 380cc injectors, new DP, S3/TT 3" MAF housing (with stock MAF element), S3/TT Forge TIP, Forge Turbo Outlet Pipe, Coolant feed, Oil return, Lengthened the stock...