Designed for 1955-86 262-400 c. i. d. small-block Chevys, the Performer Air-Gap features the air-gap design for the ultimate street performance in the idle to 5500 rpm range. This design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. High-velocity runners deliver excellent throttle response throughout the power band. The great looks of the Performer Air-Gap along with the solid idle to 5500 rpm performance makes this an ideal choice for street rods and street machines. No provision for exhaust heated chokes or exhaust crossover. For spread-bore or square-bore carburetors without adapter.Installation Notes: Recommended intake gasket: Edelbrock #FEL7201 or Fel-Pro #FEL1256Pit Stop USA offers Edelbrock Performer Air Gap Intake Manifold - SB Chevy - Performer Air-Gap (Non-EGR) 2601 at low everyday prices. Be sure to check out all of our products from Edelbrock including Edelbrock Intake Manifolds - Small Block Chevy.