Earl's Aluminum Cap -8 AN - Black Exhaust System Deals 645" inside diameter are used

645" inside diameter are used to equalize the installed height of valve springs

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Earl's Aluminum Cap -8 AN - Black Exhaust System Deals 645" inside diameter are usedProduct Description: Cap 8 AN Aluminum Black Anodized Sold Individually Earl's Performance Products was founded by Earl Fouts in 1955 in Lawndale, California. The mission was to supply high quality military aircraft surplus plumbing components directly to the racing industry from a small retail outlet. As the military surplus market dried up, Earl recognized the need for continuity of supply for the racing market and pioneered the Earl's range of