"bisi putih tarak kalat" is what they said .... that dat one feller onli kena ... too loud echaust ..... especially ppl i see with wira but running on a GSR super big piping ... walau all tow back to JPJ .... no need do piping if your piping no hole or "tarak kiaciau sama lu punya pirfoman" what they say to those ppl who wan to change pipings .... stock piping sure can go up genting .... bigger ones i think cannot ..... i mean no power ..... i got one friend change piping to 1.75 then change back to 1.5 coz cannot tahan the power .... too power oledi .... until i also dunno how to describe .... in palce need power it wun .... but in place dun need it'll come automatically ......