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

Lexus IS steering rack attachment/cross-member insert along with cross-member supports are included in the kit

-7 kg of combined weight saving over original components

Roll center has moved higher

the improved knuckle kinematics together with adjust the Ackermann angle will significantly improved handling at a high angle

Concaver CVR4 21x9,5 ET14-61 BLANK Double Tinted Black CB: 74,1 Ventiler you can benefit from optionalPCD: 5x108, 5x110, 5x112, 5x114. 3, 5x115, 5x118, 5x120, 5x127, 5x130 ET: 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61