also ngk spark plugs and wires is a must.
NGK Spark plug, NGK Spark Plug wire, NGK Platinum Spark plug for High Performance and Racing. get platinum for 2.68. the other expensive just last longer but absolutely no different than single platinum.
and there is only one kind of wires on the same website.
ngk works best with nissans. never use bosch.
cold air intake basically provides cool air for your engine instead of
hot air from usual air filter. basically cool air occupies less volume,
and thus provides more powerful piston push. idealy gas mixture needs
to be cold in piston engines just before ignition spark. this makes engine
closer to ideal Carnot engine operation.
Nizmo is nissans performance department.
most people I know have nizmo cold air intake on their nissans.
don't buy cheap junk on ebay with "cold air intake"label on it.
better buy used nizmo.
try searching on this website
www.nissunclub.com
here is what I found about cold air intake.
Cold air intakes - Nissanclub.com Nissan Enthusiast Forums
that was just the top thread.