They appeared to be of good quality. The only problem I had was that the valve cover gasket was too loose in the valve cover groove so parts of the gasket fell out of the groove when I turned the valve cover over to install it. I ended up having to use a tiny bit of silicone gasket material to hold the gasket in place and quickly flip the lid over before the gasket came out. Once the gasket is in place and the cap is properly screwed on, the gasket expands and fills the groove. The problem seems to be related to the slippery nature of the material. I don't remember original Mitsubishi gaskets having problems like this, but they cost three times as much now.
π§ FEL-PRO VS 50561 R Valve Cover Gasket Set: Superior Quality and Durability for Optimal Engine Performance
9 Review
π§ Bapmic Engine Valve Cover with Gaskets & Bolts for BMW E82 E90 E70 128i 328i 528i X3 X5 Z4 (Part Number 11127552281)
9 Review
π§ FEL-PRO OS 30690 R Oil Pan Gasket Set: Reliable Seal for Optimal Performance
9 Review
Synthetic motor oil MOBIL SUPER 3000 X1 5W-40, 208L
61 Review