This one run ~5000 miles, 14 months, 3.0L Honda engine with RGT 5w20. Magnatec 0w20 and Bosch Premium went back. Pleased with BP results, again. No issues, silicone adbv pliable. Finding them now for ~$5 each. Note pic #2 louvers 'appear' not well open. In pic #3 louvers 'appear' to have different size openings. Note in pic #6 louvers are consistent, well formed in two directions. Only half openings be viewed down center tube. Lastly, still made in the US.