C5 Corvette ECS C5 Fuel Block '97 to '03 Corvette 3.50" Bolt to Bolt -10AN Supply, -8AN Return Line

C5 Corvette ECS C5 Fuel Block '97 to '03 Corvette 3.50" Bolt to Bolt -10AN Supply, -8AN Return Line

ECS C5 fuel system fuel block for 1997 to 2003 Corvettes, same fuel block that comes in all of our early C5 fuel systems. The standard pump fuel block is available in a -8AN supply and -6AN return configuration (or plugged off return for Stage 1 systems), with an option for -10AN Supply and -8AN return for E85. All C5 fuel hats must be measured to ensure fitment with our C5 fuel blocks, there are two different hole diameter sizes for the C5, either 3.50" or 3.75", see picture below for measurement guideline.