A couple of more questions.

hey guys Im looking at getting a GReddy EVO cat back sytem this summer along with the aem v2 induction and a new header. My questions is which header should i get? Heres a link to NOPI's available headers:http://www.nopionline.com/index.cfm?fuseaction=dspparts&vL1ID=0&makeid=250&modelid=015&catyear=1999&catid=0020&pcid=251&vTitle=1999%20MITSUBISHI%20Eclipse%20Exhaust%20Exh aust%20Header&vaffid=0

i was thinking the GReddy, but its quite expensive. Maybe the pacesetter? Any opinions on pacesetter? If you have any other recomendations Im very glad to have them.

Also I think i might try and get a new head after last months problem. grrr. Any suggestions there?

Thanxs alot,
JrS

ps. i have a 99 gs

I cant get the link to work let me try again. Heres the link to the exhaust section then click on headers. Soory for the mess up guys.http://www.nopionline.com/index.cfm?fuseaction=dsppcs&makeid=250&modelid=015&catyear=1999&catid=0020&vTitle=1999%20MITSUBISHI%20Eclipse%20Exhaust&vaffid=0

Sorry I forgot something. NOPI lists a throttle body spacer for the 420a engine thats like 85 dollars. Would this be worth the money? Would it add HP or torque or both? Also what would it do to gas milage?

I like the look of the HP chrome myself & for the $, its affordable. I've been looking into getting something for my 97 RS myself but have been procrastinating. I remember that the 4 to 1, and 4 to 2 to 1 thing makes some sort of different bends in your power band too but don't remember. Maybe someone can fill us in again on what that does...? I think most NT cars need more bottom end so we ought to get headers that help that out!?!?

Also do all these aftermarket headers still have the O2 sensor connections we need?

Can anyone answer these questions? I think most of the headers have the spot for the sensor but im not sure. Also what is the difference in power between 4-1 and the 4-2-1 headers?

a 4-2-1 header increases your midrange power and a 4-1 header affects your high end speed but usually give a higher max hp boost