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Got a header leak? Seal it up quick with our Super Thick header and collector gaskets. Manufactured with 1/8" thick exclusive material, they can seal even the toughest leaks.
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Performance World 412 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.50" Round Port. Pair. 412 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.50" Round Port. Pair.

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Performance World 413 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 Large 1.625" Round Port. Pair. 413 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 Large 1.625" Round Port. Pair.

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Performance World 416 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.42" Square Port. Pair. 416 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.42" Square Port. Pair.

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Performance World 417 Super-Thick Header Gaskets Fits SB Ford 289-351W. 1.13"x1.54" Port. Pair. 417 Super-Thick Header Gaskets Fits SB Ford 289-351W. 1.13"x1.54" Port. Pair.

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Performance World 421 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.45"x1.55" Large Square Port. Pair. 421 Super-Thick Header Gaskets Fits SB Chevrolet 283-400 1.45"x1.55" Large Square Port. Pair.

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Performance World 423 Super-Thick Header Gaskets Fits LS Chevrolet 1.75" Round Port LS1/LS2/LS6 LSx. Pair. 423 Super-Thick Header Gaskets Fits LS Chevrolet 1.75" Round Port LS1/LS2/LS6 LSx. Pair.

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Performance World 425 Super-Thick Header Gaskets Fits SB Ford 289-351W 1.25"x1.75" Oval Port. Pair. 425 Super-Thick Header Gaskets Fits SB Ford 289-351W 1.25"x1.75" Oval Port. Pair.

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Performance World 426 Super-Thick Header Gaskets Fits Ford 2V 351C/351M/400. 1.58"x1.96" Port. Pair. 426 Super-Thick Header Gaskets Fits Ford 2V 351C/351M/400. 1.58"x1.96" Port. Pair.

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Performance World 427 Super-Thick Header Gaskets Fits Ford Boss 302 & 351C 4V. 1.90"x2.20" Port. Pair. 427 Super-Thick Header Gaskets Fits Ford Boss 302 & 351C 4V. 1.90"x2.20" Port. Pair.

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Performance World 429 Super-Thick Header Gaskets Fits Ford FE 390-428 14-Bolt Heads. 1.38"x2.12" Port. Pair. 429 Super-Thick Header Gaskets Fits Ford FE 390-428 14-Bolt Heads. 1.38"x2.12" Port. Pair.

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Performance World 430 2-1/2" Super-Thick Collector Gaskets. Pair. 430 2-1/2" Super-Thick Collector Gaskets. Pair.

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Performance World 431 3" Super-Thick Collector Gaskets. Pair. 431 3" Super-Thick Collector Gaskets. Pair.

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Performance World 432 3-1/2" Super-Thick Collector Gaskets. Pair. 432 3-1/2" Super-Thick Collector Gaskets. Pair.

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Performance World 440 Super-Thick Header Gaskets Fits Ford 4.6/5.4L Stock Port. Pair. 440 Super-Thick Header Gaskets Fits Ford 4.6/5.4L Stock Port. Pair.

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Performance World 441 Super-Thick Header Gaskets Fits Ford 429/460 Non-EFI. 1.25"x2.08" Port. Pair. 441 Super-Thick Header Gaskets Fits Ford 429/460 Non-EFI. 1.25"x2.08" Port. Pair.

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Performance World 443 Super-Thick Header Gaskets Fits Early '67-'74 SB Mopar LA 318-360. 1.00"x1.64" Port. Pair. 443 Super-Thick Header Gaskets Fits Early '67-'74 SB Mopar LA 318-360. 1.00"x1.64" Port. Pair.

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Performance World 444 Super-Thick Header Gaskets Fits Late '75-'91 SB Mopar LA 318-360. 1.30"x1.80" Port. Pair. 444 Super-Thick Header Gaskets Fits Late '75-'91 SB Mopar LA 318-360. 1.30"x1.80" Port. Pair.

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Performance World 445 Super-Thick Header Gaskets Fits Mopar 5.2/5.9L Magnum. 1.25"x1.68" Port. Pair. 445 Super-Thick Header Gaskets Fits Mopar 5.2/5.9L Magnum. 1.25"x1.68" Port. Pair.

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Performance World 446 Super-Thick Header Gaskets Fits Mopar Gen III 5.7L Hemi. 1.45"x1.47" Port. Pair. 446 Super-Thick Header Gaskets Fits Mopar Gen III 5.7L Hemi. 1.45"x1.47" Port. Pair.

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Performance World 451 Super-Thick Header Gaskets Fits BB Mopar 383-440. 1.78"x1.48" Port. Pair. 451 Super-Thick Header Gaskets Fits BB Mopar 383-440. 1.78"x1.48" Port. Pair.

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Performance World 452 Super Thick Header Gaskets Fits AMC '70-'79 304-401. 1.25"x1.75" Port. Pair. 452 Super Thick Header Gaskets Fits AMC '70-'79 304-401. 1.25"x1.75" Port. Pair.

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Performance World 453 Super-Thick Header Gaskets Fits Pontiac 4-Port 350-455. 1.14"x2.06" Port. Pair. 453 Super-Thick Header Gaskets Fits Pontiac 4-Port 350-455. 1.14"x2.06" Port. Pair.

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Performance World 454 Super-Thick Header Gaskets Fits Pontiac 3-Port 350-455. 1.14"x2.06" Port. Pair. 454 Super-Thick Header Gaskets Fits Pontiac 3-Port 350-455. 1.14"x2.06" Port. Pair.

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Performance World 455 Super-Thick Header Header Gaskets Fits Oldsmobile 330-455. 1.55"x1.92" Port. Pair. 455 Super-Thick Header Header Gaskets Fits Oldsmobile 330-455. 1.55"x1.92" Port. Pair.

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