How much reinforcement are we talking? Would just the usual endplates on a normal cage setup be sufficient, or do you mean reinforcing all around the top?
FWIW I'm using the JRZ RS1 package that Forged put together (which is JRZ's entry-level - single-adjust without external reservoirs, but they are true coilovers in the rear). Forged's spring setup on those is 11.5k + 9k. Feels pretty nice to me, but the car is still very much at a street level of setup (in that most of the rest of the suspension is stock, and I'm on high-treadwear street tires and no aero mods). I'm guessing I'll ramp up the spring rates later as I add other stuff to match. I run the Hotchkis sways too, lately using the stiffest setting in the rear (but I'd probably back that off a notch or two if I wasn't losing front grip to camber issues...).
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