hash4u,fahadsoulsnatcher911,SER_GTR,ravager and hash4u,thanks for the concern,one thing ive learnt is that in life there is no such shortcut,there is no all in one.can anybody confirm me about installing headers and downpiping on cng,and any advise on the valve cover?ravager bro konsi wali so called fastest civic hai jis ne 240 touch kia hai is on gas aswell