Genuine Honda O-Ring This is a must if you are removing the water passage housing. Never re-use old o-rings. #6 in illustration FITMENT: Most K20 engines: K20A2, K20A3, K20Z1, K20Z3, K23A1, K24A1, K24A2, K24A4, K24A8, K24Z1, K24Z2, K24Z3, K24Z6, K24Z7 F20C, F22C 2002-2006 Acura RSX 2000-2009 Honda S2000 2013-2015 Acura ILX 2007-2012 Acura RDX 2004-2014 Acura TSX 2003-2012 Honda Accord 2002-2015 Honda Civic Si 2002-2014 Honda CR-V 2012-2015 Honda Crosstour 2003-2011 Honda Element