Ferrea Chevrolet LS1 .3138in .502 OD 2.000 Length .500 ID Exh/Int Valve Guide - Single (D/S Only)

This is a single valve guide from Ferrea, designed for Chevrolet LS1 engines. It's meant for either the exhaust or intake valve and has specific dimensions: a .3138-inch inner diameter for the valve stem, a .502-inch outer diameter that fits into the cylinder head, and a 2.000-inch overall length. The .500-inch ID is where the valve itself seats.

Ferrea is known for making well-built engine components, and these valve guides are no exception. They are made to precise specifications to ensure a good seal and proper valve movement. This particular guide is a single unit, and it's important to note it's for the driver's side (D/S) application, which usually means it's for a specific bank of cylinders on the engine. When rebuilding or working on the top end of your LS1, having guides that fit right and maintain proper valve alignment is key for performance and longevity.