No, the EML will not affect the overall running of the engine however, the EGR delete will improve low end responsiveness a bit and it will keep your inlet manifold clean
The standard airbox is good for over 220bhp so don't need to mess with it unless you want to 'smooth' it out however, no gains are proved.
Also a Turbo back exhaust will look and sound better but people claim the standard is good for over 200bhp but a mufflerectomy increases bhp so work that out
