This is a Proform 141-858 Chevrolet Performance Slant-Edge Aluminum Push-In Breather Cap.

Material: Made from high-quality aluminum.

Design: Features a push-in style for a 1.22-inch valve cover hole (grommet not included).

Finish: Black crinkle powder coat finish with a raised milled Bowtie logo.

Function: Provides engine ventilation and is designed for off-highway or racing use.