Up for sale is a high quality piston set manufactured by Federal Mogul as aftermarket replacement for Isuzu P/N 5-12111-022-0, 8-94438-989-1. It fits the Isuzu 4BE1 engine and has a valve recess. It has a steel insert also known as Alfin for increased durability. It comes complete with pins and circlips. The 4BE1 engine has two types of pistons (i.e. with valve recess and the other without valve recess) so the buyer has to match up the old pistons to the pictures in this listing before buying.