2012 Isx 2350 475 with codes 4726 and 0559

[Hermjeji]

Look around for prices at a few places. Some dealerships were quoting me a 400% increase on the fuel pump rebuild kit, at that point it was only 200 more for a complete head.

For a 2250 the P/N are as follow:
Tappet(roller) - 4359134
Plunger - 4327258
Gasket (needs to be replaced every time you remove the head) - 2872513
Washer - 3963990 and 3963988

You need 2 of each except for the gasket.