Fel-Pro Intake Manifold Gaskets - SB Chevy - Aluminum Heads w/ Non-Conventional Ports, Chevy 18 High Port - 1.25" x 2.15" Port Size - .060" Thickness Header Bolt with '1' being the least

with '1' being the least aggressive program and '9' the most aggressive

630" ID Spring - 0

The mounting bosses are cast into the manifold only to facilitate fabrication of bracketry

10-1/2 x 8-1/2 x 1/4 in

1987-1991 Cadillac Allante

Fel-Pro Intake Manifold Gaskets - SB Chevy - Aluminum Heads w/ Non-Conventional Ports, Chevy 18 High Port - 1.25" x 2.15" Port Size - .060" Thickness Header Bolt with '1' being the leastFel Pro deliver reliable sealing under grueling racing conditions. From the leader in aftermarket engine sealing, FEL PRO the gaskets professionals trust. Each gasket, set, or seal is built to meet or exceed all original equipment specifications and is validated for fit, form, and function. GMP Performance V8, 262 (4. 3L), 265 (4. 3L), 267 (4. 4L), 283 (4. 6L), 302 (4. 9L), 305 (5. 0L), 307 (5. L), 327 (5. 3L), 350 (5. 7L), 400 (6. 6L); 18 Degree High