Pentius PAB4521 UltraFLOW Air Filter Advanced filtration technology and superior filtration performance Premium, heavy duty components contribute to a high level of durability, as well as maximum engine protection and fuel efficiency Warranted to be free from defects and are fully compatible with conventional oil as well as synthetic, and synthetic blend oils New vehicle manufacturer warranties remain in full effect when Pentius UltraFLOW filters are properly installed and installed based on manufacturer recommended service intervals Packaged individually in the distinctive Pentius UltraFLOW red and white box