Megan Racing Lexus IS250/IS350 (2006-2013) & GS350 (2006-2011) Rear Adj. Traction ArmMegan Racing Rear Adj. Traction Arm Fits Lexus IS250 IS350 (2006 2013) & GS350 GS430 (2006 2011) These Traction rods also allow for fine tuned adjustments to the rear suspension geometry. By changing the length of the traction rod you change the position and pitch of which the suspension rotates upon and you change the amount of "Anti Squat" of the rear. Although the adjustment is minimal, it can change the behavior or the vehicle during weight