I have a 2001 Subaru LL Bean 3.0 H6 that has a blown head gasket. My question is that I thought all 2001 thru 2004 3.0 H6 engines were the same. I had run across a 2003 3.0 H6 motor but for some reason, I see the 2001 excluded from the range of years of 2001-2004. They seem to have 2002 thru 2004 lumped together and the 2001 seperate. My question is if there really is a difference??? Any info would be helpful. Thanks.