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NC sway bar reccomendations
copyright Supermiata LLC 2021

 

OEM

Front 21mm tubular
Rear 11mm base, 12mm sport

Racing Beat 25 & 32mm front
Whiteline 16mm rear

Xida with 280/224 Touring springs

Never 32mm front or 16mm rear. The shocks and springs will control roll enough for street and casual auto-x ot HPDE
Too much sway bar will make the car skittish and drastically reduce ride quality

For >280tw or tires 225 or smaller, 7-8" wheels, stick with OEM bars

If 245’s or <280tw:
Racing Beat 25.4 adjustable
RX8 “red” 25.4 (non-adjustable)
RX8 “red/yellow” 25.4 (non-adjustable)
Not RX8 yellow 26.8

Xida with 616/392 Race springs

245 or smaller tire, 280tw or softer, 7~8.5" wheel:
Racing Beat  25.4 + Whiteline 16mm rear
RX8 orange 26.8 + Whiteline 16mm rear
RX8 yellow 26.8 + Whiteline 16mm rear

255-285 on 9-11", super200 tire, or any size Hoosier on any size wheel:

RB 32mm front + Whiteline 16mm rear
RX8 bar not big enough

The 19mm rear is really too big for anything. If your NC understeers, something else is wrong. Perhaps more front camber, fresher tires, different spring rates, more rake. Adding the 19mm rear will just make the car skittish and reduce overall peak grip.

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