Intakes are not a big thing to worry they work well on both petrol and CNG u just need some adjustments
Power increase a very lil bit only if u place the intake away from the engine as much as u can a place where it can get fresh and cool air.
Problem could be u need to wash it after a month , if u want to clean engine bay cover it properly and always use top brand INTAKES and original ones becoz there are fake ones in market which only filter bugs but the dust will go across them easily so be careful