: 1997 STS N* connecting rod stamped number

03-06-12, 04:43 PM
I am rebuilding a N* out of a 1997 STS. One of the connecting rods is bad and I bought another piston/rod assembly off of Ebay. They look to be the same but the numbers stamped on the connecting rods is different. The ones out of the N* motor have 474/475 stamped on them and the one I bought has 426/427 stamped on it. Anyone know what this number means? Will the one I bought off Ebay work? Pics are attached. Any help is very much appreciated.



03-08-12, 12:50 PM

03-08-12, 01:21 PM
I wish I could help, but I do not have any pictures of my connecting rods from my disassembly. Rods from a 96-99 should be all the same.

03-08-12, 03:13 PM
Contact Jake at Northstar Performance. He'd be the guy to ask.

johnny kannapo
03-08-12, 10:22 PM
Usually casting numbers are time/date production identification & that would be the only difference for the different year model groups.