SI bronze, 2v/4v valve guides, sold in sets of 16

SI bronve valve guides for 4.6 and 5.4, 2v and 4v engines. These are stock length and designed to ensure maximum airflow and strength.  The are made of premium grade manganese-bronze alloy.  The guides are compatible with stock style valve...

Supertech/Apocalypse 4.6/5.4 4V valve seals (32ea)

Ford Modular 4.6L/5.4L - 7mm Viton valve stem seals, 32ea.  These fit all 4.6 4v cylinder heads.