They have a large runner cross-sectional area (3
One 2-1/16 in Hole
The kit has a large 3 opening with an easy to grip screw on cap that utilizes an O-ring seal
Self Lubricating Bushings For All Weather Performance
Fel-Pro Header Gaskets - SB Chevy - Stock, Square Port - 1.38" x 1.38" Timing Pointer They have a large runnerFel 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) Resists blowout