Re: Project Log: 320 to AMG/SRT Level
I think what everyone has been trying to explain to you is that if one person gets 15hp dyno proven after doing a cold air intake, while another person gets 12hp proven after a set of headers that doesn't not mean that you will pick up 27hp by doing both these modifications. These things dotn add up that way. But to answer your question can you get 300whp from a mercedes 320 motor? Yes and even way beyond that if your willing to crack open that motor past simple bolt on performance.
But if your really wanting more hp you need to think bigger like custom grind cams, higher compression pistions, and custom built intake manfold, or maybe increasing the bore and stroke for more displacement.