Polished Aluminum Ball Milled Valve Cover Breather (1" Neck Push In) heat-treated to the highest Rockwell

heat-treated to the highest Rockwell hardness available

Windsor and Big Block versions are built from sturdy cast aluminum

and built to exacting tolerances

NOTE: You need Studs and Guide Plates to Run Roller Rockers

Speedmaster CNC ported cylinder heads are machined on dedicated 5-axis CNC machines to ensure accuracy and better flow

Polished Aluminum Ball Milled Valve Cover Breather (1" Neck Push In) heat-treated to the highest RockwellThese aluminum push in breathers from Speedmaster are just the thing to prevent oil splash while adding some style. They are available in plain and ball milled designs to best suit your tastes and match your ride. Speedmaster breathers keep your crankcase properly vented and add a little shine under the hood. They are available in a wide variety of styles for many applications.