H&R part numbers for their standard coilovers are:
29591-3 for Sedans
29591-4 for Avants
which can lower the front between 1.6" and 2.5", and the rear 1.3" and 2.0".

H&R also makes a set of Ultra-low coilovers, but only have a sedan part number:
50011-1
which can lower the front between 2.0" and 3.0", and the rear 2.0" and 3.0".

I called H&R, and was told that they wouldn't interchange, but didn't recieve an answer as to why, besides that the part numbers are different.

Besides spring rates and possibly valving rates, will the 2 interchange?

 

Greater weight on the rear of the Avant may have necessitated different suspension geometry, and therefore maybe slightly different parts back there, which would interfere with the mounting of the springs. I don't know, but other than spring strength, that's the only thing I can think of.

 

Koni doesn't distinguish between the two with their shock or coilover kits. I just don't wanna dump almost 2 grand into coilovers that might bolt up.

 

why dont you just buy the ones for the sedan, so you know they fit ?

 

I'm guessing he's not sure they'll fit his Avant [8D].

 

damn ! i've been dooped, nvm.. i thought he had a sedan

so then, why dont you just buy the ones to fit an AVANT

 

They don't make Ultra Lows for Avants.

 

i doubt they're interchangeable cause of the avants extra weight. but if Koni doesn't distinguish between the two, i would give them a call instead and ask if their interchangeable, you might get a clearer answer

 

im pretty sure they will work
there was some guy that bought used ultra lows on audizine, and put them on his avant

 

Good thinking on calling Koni! That may be the answer.
And LV, I'll search audizine, thank you for the tip!