Fel-Pro 1252-3 is a high-performance composite intake manifold gasket set for Chevy big block V8 builds using rectangular-port cylinder heads, including 396, 402, 427, 454, 502, 510, 540, and 572 cu in. engines. The no-metal-core construction lets engine builders trim the gasket for modified ports, while Printoseal sealing beads help concentrate sealing load around the intake openings for a dependable seal on cast iron or aluminum heads.

Fel-Pro 1252-3 Technical Specifications:

• Composite construction uses a .060 in. gasket thickness and can be trimmed more easily than a metal-core gasket when matching aftermarket or modified intake ports.
• Rectangular intake ports measure 1.796 in. wide by 2.480 in. tall, matching common performance big block Chevy rectangular-port cylinder head layouts.
• Printoseal elastomeric sealing beads add sealing support around the intake port area to help manage imperfect mating surfaces in repair and performance builds.
• Designed without exhaust crossover openings or blocking shields, making it suited for applications where the intake setup does not use an exhaust heat crossover.
• Compatible with both cast iron and aluminum cylinder heads, giving builders flexibility across factory-style and aftermarket big block combinations.
• Designed without upper bolt holes and does not include an upper intake manifold plenum gasket.

Includes:

• Composite rectangular-port intake manifold gasket set

Best suited for performance engine assembly, port-matched intake installations, and modified big block Chevy builds where a trimmable composite gasket is preferred.

Fits Chevy big block V8 engines in 396, 402, 427, 454, 502, 510, 540, and 572 cu in. displacements when paired with rectangular-port cylinder heads. Not intended for use on emission-controlled vehicles.