[Shankenstein]

For those keeping an eye on Bilstein upgradeable coilovers, the current catalog has all of the piston shafts/rods listed.

Non-adjustable: $35
Single-Adjustable: $285
Double-Adjustable: $421

By offering a non-adjustable setup, RCE is saving the customer $1200 on a set (in parts with no markup). I'm sure they (or GTWorx) could make a tricked-out setup if you'd like.

Personally, a square spring setup won't dance (oversteer) eagerly enough for my needs (400/400 is 2.5 Hz front, 2.1 Hz rear)... but it will be forgiving and confidence-inspiring for those who enjoy spirited driving and autocross (STX). Power oversteer will still be a thing, but you can stay on the jagged edge with confidence (just like the Tarmac 2 coilovers won over Randy Pobst).