Amazon.com: Oil Breather Cap-Ls Breather Kit - Aluminum Alloy Valve Cover Oil Cap with Breather Baffled Valve Cover Breather Oil Cap with Air Filter Fit for for LS1 LS6 LS2 LS3 LS7 :
Oil filler and air breather cap TA-46-B-10-B-0-0-1-P01
Ford Racing Air Breather Cap w/o Hood Chrome 37995022366 | eBay
C5NN9A660B Years:1965-81 Breather Cap. For 2" Air Intake Pipe. Cap Is 6-1/2" Tall. For Dry-Type Air Cleaners On Gas Engines.
Air Cleaner Inlet Cap Stainless Steel - 4 State Trucks
SFN. Breather caps Without air filter, marked "OIL" | Elesa+Ganter