Fel-Pro Intake Manifold Gaskets - SB Chevy - Aluminum Heads w/ Non-Conventional Ports, Chevy 18 High Port - 1.25" x 2.15" Port Size - .045" Thickness AA0700AF2T570401 4-hole spacers enhance low-rpm torque

4-hole spacers enhance low-rpm torque and throttle response and dampen reversion effects on the carb

from 1-3/4" to 1-1/2"

using the large Gladiator U-joint cross which never needs grease

They're designed to make it as easy as possible to install a pan and seal it properly

7/8 in Spline

Fel-Pro Intake Manifold Gaskets - SB Chevy - Aluminum Heads w/ Non-Conventional Ports, Chevy 18 High Port - 1.25" x 2.15" Port Size - .045" Thickness AA0700AF2T570401 4-hole spacers enhance low-rpm torqueFel 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