P2M Z33 350Z/G35 front upper control arms are constructed from high strength S45C steel alloy. Unlike other cars, the 350Z once lowered required negative camber adjustment. These Front Upper Control Arms were designed for this type of adjustment (negative camber adjustment only). Having the correct camber dialed in is crucial for the life of your tires and also vehicle handling performance. Arms comes with thick powder coated blue finish for rust prevention.