K&N KN171B Oil Filter Height of the oil filter is 4.055'' (103 mm), weight is 0.8 lb (0.4 kg) and its outside diameter is 2.98'' (76 mm) Anti-drainback valve (where applicable) eliminates dry starts, prevents oil from draining back into crankcase during engine shutdown Internally lubricated gasket provides positive seal while allowing easy on and off of filter Rolled threads provide extra protection against stripping Heavy-duty construction