The Edelbrock Performer RPM Q-Jet #2506 marine intake manifold is designed for 1987-95 262-400 c.i.d. Chevy V8's for spread-bore (Q-Jet) or square-bore carbs. The Edelbrock Performer RPM Q-Jet #2506 intake manifold is designed specifically for demanding marine applications and delivers maximum power and a broad torque curve for high-performance marine. The Edelbrock Performer RPM #2506 intake manifold is a dual-plane, high-rise design with a 180-degree firing order to produce incredible top-end horsepower while retaining good throttle response. Delivers maximum power and a broad torque curve for high-performance marine. Carb pad will accept square-bore carbs without adapters. The Edelbrock Performer RPM Q-Jet #2506 marine intake manifold features brass lined front water crossover and brass flange inserts to cover the rear water openings. The Edelbrock Performer RPM Q-Jet #2506 also features a natural aluminum finish for a classic look. For the ultimate "Made in USA" quality, every Edelbrock intake manifold is cast and machined in the USA.
Installation Notes:
• Recommended intake gasket: GM #10159409
• Manifold ht: A-4.20", B-5.25" (.70" taller than #2101)
• Carb pad height: 4.27"
• Port exit dimensions: 1.16" x 1.92"
• Has provision for exhaust heated divorced choke for Q-Jet Carbs.
• Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant #1076, DO NOT USE END SEALS GASKETS.
• Sealant must be used on intake bolt threads if the threads extend into lifter valley or coolant passage.
• Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum.