PH8172
L35310
That would be a Fram PH8172
12-050-01 may be a better number to search oil filter suppliers for a substitute. The Kohler oil filter 12-050-01 was superceeded to 12 050 01-S1. Fram still has the old number and it crosses to Fram filter PH8172
The stp s3512 oil filter is the cross reference to the fram ph8172 oil filter. Both brands are equipped with an anti drain valve and the canisters are the spin on variety.
Acording to the Fram Oil Filter reference guide, Kohler 12 050 01 s can be replaced with Fram PH8172.
PH8172 per Fram website (framcatalog.com)
NAPA 1056 is a part number for their spin-on engine oil filter. The Fram cross list for #1056 are part numbers PH8172 and PH8170.
Baldwin - B10140 Fram - PH8172 Kohler - 1205001 B&S - 492932
The FRAM list says that is not a FRAM number
Ph5 Fram oil filter fits GMC 7.4L or the 454 cu. in.
Ph5 Fram oil filter fits GMC 7.4L or the 454 cu. in.