ok 1- best is go to the hondata.com site for info. or contact Rob at ( Laminar-auto 514 595-5394) 2- short-ram is mostly for intake sound no real hp.gain the best one is the AeM V-2 but w'ont give as much gain as the cold air system. k series loves colder air , injen is the best one a litle more expensive then Aem and very close to the same hp. gain it's moore a personal choise and they differ a litle in instalation injen is a less complex instalation. you should at the same time get the hondata intake gasket (75.00) again to keep your intake temp. as low as possible headers is a personal choise too. toda as the best one but that's the most expensive more then double the price of the D.C. jacson racing as a good one but then again moore $$ 860. and there's also comptech but $$ D.C. is the popular choise less then half the price of a toda and 2/3 of the hp. ceramic header is less expensive than stainless/steel same hp. some guy's also bypass the coolant liquid from the trotle/body again to keep intake temp low . (summer-time only) *tu*