The Edelbrock Signature Series Chrome Valve Covers are engineered for function and styled for good looks. They are triple chrome plated for long lasting good looks and have stock-style breather baffles that prevent oil passage to the PCV valve. These quality valve covers accept all emissions equipment, including PCV valves and include rubber grommets for the breather and PCV valve holes. The covers clear most aluminum rocker arms and moderate lift cams. They come in a high-profile design that's 1-1/4 taller than stock. It clears most roller rockers, valve train components, and has a low-profile design that clears air conditioning and alternator brackets.