No tracks are fit for 130 kmph only.....133 kmph is may be GPS error for some where & this train is hauled by wap-4 in which some times over speeding occurs as when loco reaches the max speed according to section lp pressed a speed limiter button in that case train may go higher then max permitted speed for a minute......in WAP-7 there is a speed restriction of 130 by Indian railways........ 130 kms is the Max permitted speed to this train in NCR & ECR( after leaving Patna but fully 130 action starts from neora)...Now pnbe-mgs is fit for 130 kmph