Features: - 1L Bel-Ray Foam Filter Oil is a foam air filter oil for all street, off-road, and racing foam air filter applications - Innovative Bel-Ray technology has produced a foam filter oil unlike any other - It is easy to apply and improves airflow - Ultra-viscous formula forms an oil barrier to trap micron-sized particles that can cause engine damage - Bel-Ray's waterproof air filter oil prevents clogging when wet What's in the box 1x BelRay Oil