Proflow fabricated aluminium valve covers deliver high-end looks without the high-end price! They're constructed from 6061 T-5 sheet aluminium and precision TIG-welded for a proper fit. Plus they feature thick one-piece CNC billet flanges for superior sealing. Proflow's valve covers are available in black powder coat finish, as well as with or without breather openings—and heights to clear most popular rocker arm combinations.