go with a s2 composite rail, and imanifold. Also if you decide to use higher compression pistons, get the kind with heat dissipation coating on the tops like the stock honda pistons have, also use stock honda rings. With more aggressive cams you really dont need all the added fuel shit. If youre not boosting the only thing I can think that would require that is an itb setup. head studs and mains, for an n/a car? even forged rods arent necessary(theyre actually heavier then stock, duh). focus on keeping the air and fuel cool, and igniting it properly and it'll do fine. Greddy makes a nice 4-2-1 single piece stainless header for the price.