I *THINK* they no longer have the "standard;" the marine is the only option. Last I knew, (aug03) the part #s are 3283335 for std thick; 3283337 for . 010 over; 3283339. But, since this is the new year, Cummins may have superceded the part #s. I will say that the Cummins is much better than some aftermarket gaskets.
Daniel