I purchased the heads in 10-1-2001 and SER#0501-2055andSER#0501-2063. The heads are nonported.They have 300 miles on them and are in new working condition.No cracks or stripped holes .There is nothing wrong with this set of heads. make offer was thinking $1040.00shipped.call 586-839-0902 or email www.jkessler @ buick turbo.com.