went to a accessories store...
 

i went to this store and asked the guy about headers, exhaust, etc. he told me i shouldnt bother with the headers and i should stick with the exhaust, a good intake, better ignition, more fuel and maybe some porting. i forgot why he said to forget about the headers, something like its a lot of money for not a big difference since ill lose pressure and also something to do with the original escape for the exhaust stays the same size....sorry if i confuse anyone

and to add on to the headers part... since the 1.6 liter is a smaller engine, it wont make a big difference with the headers.

Sell you car and get 1.8 or 2.0 liter-I assume you have 3 rd gen(put your car specs in sig, duh!)
It will cost you few extra grand, but you'll get +25 hp with factory warranty. You'll need to drop some major cash to get that hp gain from mods-start with exhaust and CAI and it will set you back $600 for 5-7 hp, headwork $1500 for another 10(and you loose your bottom end), header-$300, ignition is waste of money, it has enough fueling. Do you want to drag race it?
Think about it.
Alex

i wooooould sell my car but i am paying loan on this one, maybe when im on my own ill sell it but i dream of having the fastest 1.6 liter in the world!! muahaha (yea right)... oh and i have a sig now