I was hoping an experience tuner could give me some tips on what to purchase for the s2000 engine. I want to keep it N/A for now....

I was thinking probably
headers
pullys

no exhaust upgrade
already have an air intake

I was hoping you could recommend a header and set of pullys as wells as other options i know im overlooking for hp gains that wont break my pocket book.

What would the top 4 headers be?
top 4 pulleys?

top 4 anything else...

Thankyou
Drew