for an ls motor, what do you guys think would be the best header to match up to a spoon n1 exhaust, 2.5" all the way? im thinking 4-2-1 for the mid-range increase but what brand header do you guys recommend?

 

depends on your power goals. or is this all your going to do with the engine. i would say a safe bet would be an itr header

 

i see, if i decide to go ls/vtec later on, what would you suggest

 

RMF, SMSP.....etc

 

what if i narrow down the choices to 4-2-1 and not custom, do i still have a lot of choices for 2.5?

 

JDM ITR

 

jdm itr is 4-1...you can go the cheap route and go megan or dc sports headers that come in various styles.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by silentdeath12886 &raquo;</TD></TR><TR><TD CLASS="quote">jdm itr is 4-1...you can go the cheap route and go megan or dc sports headers that come in various styles.</TD></TR></TABLE>
Forgot about that detail... Megan racing

 

PROFAB header! its an smsp copy and makes great power all motor and its a 2.5 inch collector. but u have to use a custom straight pipe because a stock length cat wont fit

 

i need to do my gs headers also. out of tons of reading seems oem itr is my best bet? also does it basically match up upon installation? or do i need to cut/weld some jazz?

also does the wideband sensor connect near the end of the header-manifold?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yeahright &raquo;</TD></TR><TR><TD CLASS="quote">i need to do my gs headers also. out of tons of reading seems oem itr is my best bet? also does it basically match up upon installation? or do i need to cut/weld some jazz?

also does the wideband sensor connect near the end of the header-manifold?</TD></TR></TABLE>
If it is the OEM JDM ITR it won't fit because the collector is bigger than the stock piping. If you are switching out your entire exhaust system then go for it. I'm think this is true with the USDM ITR's collector as well, but I'm not sure. USDM ITR is cast iron so it doesn't really save any weight or anything. I bought a used dc header for $50 and it works for me.