[TatII]

i wouldn't get any of those aftermarket ones. becuase you need the ones with a shroud for it to work perfectly. those flex a lite fans don't cool as well becuase it only cools that small area that the fan covers. if the have a shroud like the factory ones, the shroud itself forms a sucktion across the whole area of the radiator that it covers. there fore there will be no hot spots in the radiator. so i suggest gettin the B13 sentra fans. both of them. its should be a straight bolt on just like the dual flex lites. but you'll be saving over 100 dollars. because the flex a lite fans aren't direct bolt in, you still have to do wiring, and you have to put those cheap zip tie things to hold it in. while the B13 sentra fans will mount up perfectly with the stock mounting points.