So I know that Nissan revised the suspension in 2004.5, and stiffened up the rear spring rates. Did they also re-valve the shocks to match this higher spring rate? I'm thinking that a set of stock '04.5+ rear shocks would be a nice (& cheap) match for my RSR Ti-2000 springs on my '03, but I just wanted to make sure I didn't buy the same shocks that I already have.

 

Courtesy Parts shows the same rear shock absorber for all years of the 350Z through '07.

http://www.courtesyparts.com/350z-pa...5_800_804.html

 

The should have, actually they better have. With the update they probably don't sell the outdates shocks anymore.

 

Yeah, I'm almost sure they were revised and the new part superceeds the similar part number but I can't find anything confirming it either.

 

In the same boat OP, need a new set of shocks for my 03 Z with lowering springs. I'm looking at Konis, as I'm looking for the adjustability they offer for autocross and also for using the Z as a daily driver.

 

I got Tockico blues... they claim 25% stiffer than stock. Which year of stock I don't know... but they are nice and tight and i'm happy with them. They were cheap too. Maybe there are better options out there but I don't know.

 

Yes, and even though front spring rates did not change with the revision, the front shocks received revised valving as well.

In the rear the revised shock has less rebound, but the exact same compression damping as the 03/04 shock.

In the front, they pulled down both compression and rebound damping, not surprising should you overlay a 03 shock dyno over a koni shock dyno.

 

I would not read anything into any claim that they are valved stiffer, makes no sense given the changes Nissan did on their own and given what a HP shocks roll in life is.

Better option, Tokico D-spec, which has nothing to do with being adjustable but everything about being valved right.