[Jeff Teuton]

It is a2009 motor. It evolved from 1993 truck to the 1998 R/T which had R/T heads and a single plane manifold, then both the stock heads and the r/t heads disappeared and the motor resurfaced in 2009 with the alm heads. The number you quoted is the casting number, but the part number for the heads is P5155285 for stock and the number you quoted is legal for ss. Part # & casting number is same for ss. I have both heads in stock if you are interested.