MLS Cylinder Head Gasket Set Compatible with Silverado Tahoe Express Suburban Sierra 1500 Yukon 4.8L 5.3L V8 OHV HS9292PT ES72220

2011 Sierra 5.3 lifter replace on passenger side only. Head gasket fit like it should. Not all water passages were the same size as the original gasket but should work ok. One of the two intake gaskets was a little misaligned between the #1 & #3 cylinder. The two plastic connecting tabs were bent. I used a heat gun and then wound up cutting a connecting tab so I could physically line up the #1 cylinder part of the gasket when assembling. That cured that issue. The exhaust gasket and valve cover gaskets lined up as they should. I only did the passenger side lifters so I'll have a set of good gaskets for the driver side if needed. 4 stars because of the intake gasket misalignment, other than that, they seem to be good gaskets.

Right away I had my doubts when I attempted to set the first gasket on the block and the dowel pin holes did not want to line up, I had to somewhat force them over the dowels but at that point I though ok no big deal. BUT! first start up of the engine BOTH of them are leaking externally in the same location on both sides. just above the motor mounts. This was on a freshly decked block and heads straight from the machine shop. The only positive about this was I had the engine on a run stand and not in a vehicle so it was easy to spot and fix. Now had I put this in my truck and discovered it there I would have been extremely upset about it. I pulled the heads back off and put on some fel-pro units from the local auto parts store and no issue no leaks everything is good. The other gaskets included in this kit worked fine no complaints but do not purchase this kit for the head gaskets they are terrible! Lesson learned!

Gaskets all looked great and packaged well but no headbolts is a big deal for me. I'm glad I noticed before I tore my engine down. The headbolts were one of the main reasons I went with this set and shipping time. Now I have to heat up my engine to go look for headbolts and then wait for it to cool down, putting me way behind schedule.

Quality of intake gaskets look terrible but I will install everything and see how it fits and overall performance afterwards.

1) The head gaskets on this set DO NOT FIT CORRECTLY!! All of the holes, including the cylinders bores are misaligned almost 8mm and do not allow the gasket to center. See the pictures attached, the left side alignment pin is in the block and nothing lines up.2) The Intake gaskets arrived broken.