PERFORMER RPM Q-JET (1500-6500 RPM) Designed for 1955-86 262-400 c.i.d. Chevy V8's for spread-bore (Q-Jet) or square-bore carbs. Delivers maximum power and a broad torque curve for high-performance street. Carb pad will accept square-bore carbs without adapters. #2504 Marine intake features brass lined front water crossover and brass flange inserts to cover the rear water openings. Performer RPM Q-Jet has same provisions as #7101. Will not fit under stock Corvette hood.