Got it in and wow...I like!!! Car has got kick again after 43lbs/wheel! I compared it to the stock LS header and it had bigger piping, and the 4-2-1 design is more pronounced....other than that, looks stock. Let me know if you have done this swap...I feel some power in the mid-range...

 

So is it a USDM ITR header then?

 

Nice! I didn't know that USDM ITR headers are 4-2-1. I would think that they'd be 4-1. *shrugs*

Just one thing:

I'm not sure what this means. Do you have 43 lb. wheels? Did you mean 4300 RPM? Please to clarify this statement thanks.

 

43 lbs per wheel?!? stop all your turbo plans and get some new wheels.

 

yeah,
17x7 konig tantrums
w/ tires = approx. 43 lbs each.
struggling for lighter 16" wheels....anyone willing to help?

YEAH, it's a USDM header. got it for $60 and installed it for free...

 

Thats really not that heavy. I am using Racing hart 15 inch CP-F evolutions (9 LBS.) and Kum-HO tires, I weigh in at 30 pounds brand new.

 

I have the US ITR Header on my LS also, I noticed some good midrange and top end power. I got mine for 45 bucks

 

10 lbs is a significant difference, especially on our low torque motors.

 

Any of you with the itr header done the 1/4 mile yet???

What do u guys think you'll be runnin' if u havent yet???

 

what year itr header did you put on your car. anything above 97 has a bunghole in the collector on the a pipe. what did you use to fill this hole?

 

So where are you guys getting these ITR headers so cheap?

 

au-gsr, what hole are you referring to? I got mine from a 98 and there is nothing that needs to be plugged. The only thing is the place for the 02 sensor right before the cat. Is this what you are referring to? I haven't taken the car to the track, however, with my HX wheels and good cold night, I'm hoping for mid to low 15's. Is this reasonable? Has anyone got the numbers for the 1320 for a stock LS. I got CAI, USDM ITR header and catback exhaust, and a short shifter.

 

the gsr models don't have an o2 sensor at the point you were talking about. the only o2 sensor close to that position is on the catalytic converter. i could be wrong about that but i looked under my car and that was the only sensor i found near the end of th exhaust header.

 

So where are you guys getting these ITR headers so cheap? ???????

 

I know. Where would be a good place to pick up an used usdm ITR header?

 

I remember selling mine to Brandon a couple of years back. Right in the parking lot of Stream Int'l in Dallas. I'm surprised he's still got it.

 

i had a friend who went with jdm, then went on to boost.
got it for cheap cuz he didn't want it.