How much of a significance are they to use over Itr/Gsr rear uppers? I noticed their construction is more like a tube? Are they worth the upgrade?

 

yes they are worth the upgrade..if you have a lowered suspension..get an adjustable one..

 

Adjustable rear upper arm? What would you recommend?

 

Mike at IPS sells them (JDM rear upper control arms) for around $100 and he told me that they make a significant difference in handling. I have yet to get them though.

 

If you sold something would you say it's insignificant? What is functionally different about the arm? Is it just the arm it's self or is it the bushings? Either way get the Ingalls ones. At least those add functionality rather than add JDMness.

 

The USDM upper arms give more neg. camber than the JDM ones... in a sense, they assume that the average US driver can't drive for ****! Your car will rotate a little better due to less neg. camber...

 

huh? all this time i thought the jdm upper arms had more NEGATIVE camber... doh.

i used to have ingalls rear adj. control arms.... what a piece of crap. not only were they noisy, but on one side the bushing fell out and i had one wheel partially collapse on me

 

I thought the only difference was the JDM upper control arm being beefier than the USDM one. The on the USDM ITR is like the one used on the GSR.

 

King Motorsports has some of the nicest adjustable rear upper arms I have seen. with adjustability it wll not only be a matter of more or less but EVEN camber.

 

You weren't kidding they were nice.
http://www.kingmotorsports.com/produ...g/rear_uca.jpg

But dang at 375 thats hard to swallow...

I bet you could make those your self if you could get your hands on the parts.