I prefer this gasket to the metal version. This gasket fits all three engine types (4.8, 5.3 and 6.0) on a 2001 GMC Sierra 1500. My 4.8 was rebuilt 2 years ago and used a metal gasket that started leaking a month ago. The stock plastic gasket was 13 years old before I replaced it, it didn't even leak but I replaced the knock sensors so I put a new one in that low position and then the repair mechanic screwed me onto the metal gasket.