This is a Genuine OEM Chevrolet 67-68 L78 Chevrolet high performance Big Block 396/375hp 427/425hp rectangle port aluminum high rise intake manufold. This is an original intake from GM with the "Winters" snowflake cast mark.
Fits Big Block Chevrolet engines with 9.8 inch deck height. Used on L78 High Performance 396 and COPO 427 engines. This can be installed on any standard 9.8 inch deck big block engine with rectangle port heads. They are commonly used on marine applications. These are also commonly installed from GM on crate engines. They breathe exceptionally well. They perform as well as aftermarket high performance intakes.
