This upgrade will allow more angle for the lower control arm

You can also upgrade your pre 2021 Wisefab S13 rear suspension kit to new toe arm design by purchasing "S13 Rear Suspension Mod Kit"

no boost reference signal

Here is a VIDEO that explains the whole procedure in-depth

you can benefit from optional "C6 Rack Offset Spacer Kit" that will allow you to achieve even bigger steering angle on C6 chassis (not needed on C5) and improves the Ackermann curve

JR Wheels JR42 20x10 ET35-42 5H BLANK Gloss Black CB: 72,6 JR40 This upgrade will allow morePCD: 5x108, 5x110, 5x112, 5x114. 3, 5x115, 5x118, 5x120 ET: 35, 36, 37, 38, 39, 40, 41, 42