would a 98 JDM ITR header fit a 2001 LS?? would it give better gains than a dc sport 4-1 header?

 

Yes it will bolt on. You need a different or modified cat to accept the new collector size.

It will definately give you gains over the DC 4-1 header.

 

 

the header has a 2.5 collector right?

 

Yes.

 

hell yeah.....let me see it when i take my road trip from toronto to san antonio next summer in my R.

 

would that big of a header be too big for an I/H/C/E setup for an LS? and i might possible do cams or adj cam gears also. how much weight would i reduce with this header? if i use a ITR exhaust would i be restricting airflow??

 

your not gonna loose much weight if any. if you use the itr exhaust with it yes it would restrict air flow a bit since the header is 2.5'colector and the ITR exhaust is a bottlenecked 2.25'.

 

so what would be a quiet exhaust similar to the type-r exhaust?

 

Apexi WS.

 

i thought the WS was only 60 mm. i would like to [img]try[/img] to keep this as free flowing as possible. i dunno i gotta go to class.

 

You guys actually recommend a 4-1 header with a 2.5" collector for a mildly modified LS?

BTW, it's about 10lbs. lighter than the OEM cast iron manifold.

 

the WS isnt bottle necked so it will flow better then the type R. you dont really need any bigger the 60mm.

 

yeah i still didn't get that one question answered. would this be too large for a I/H/C/E and maybe cams or cam gears set up??

 

looks like u have lots to learn

 

My recommendation for a street-driven LS would be the Comptech 4-2-1, or maybe a DC 4-2-1.

I do not think that a 4-1 header with a large collector would be well-suited to the power delivery characteristics of the B18B. But if anybody cares to prove me wrong I'm all ears.

 

these are just questions.....i haven't bought the real thing yet! actually the first thing i shoulda asked was which one gives better low-mid range power?? i forgot. 4-2-1 or 4-1??

 

4-2-1 gives better low to mid power