J-43265 5-8840-2623-0 7.8L Isuzu Duramax Injector Nozzle-Cup-Sleeve-Tube Remover Alt Stallion ST-216 for 7800 7.8L, 2005-2010 Isuzu NPR 4HK1.

Used with ST-217

When ever a leakage occurs between the cylinder head and the sleeve or service is being performed to the cylinder head, the sleeves and their seals should be replaced. ST-216 is used to remove the sleeve. It uses the top deck of the block as support while pulling the sleeve from below.

If you wish to do this job in-vehicle you'll need ST-S923 instead.

You'll find Stallion Products are widely considered the most heavy duty on the market!  This is a high-quality tool and you will be pleased with your purchase. Don't try to save a few bucks at the expense of your engine - know that you're getting quality from Stallion Products.