Open the hood on your G35 and have someone step on the brakes. You'll see the master cylinder dive towards the frame. This hurts your braking performance & softens up the brake pedal. Our Master Cylinder Brace supports the cylinder and translates that wasted motion into braking force. You'll notice the improvement immediately. This brace consists of a adjustable red anodized billet aluminum piece with a delrin support cup and CAD plated mounting bracket and hardware.Note: **This will not fit 06 G35 Sedans. On 05-06 Coupes, the master cylinder must be 6", this will not fit 3.5" master cylinders.**