Dart block sleeves are durable and reliable! Dart replacement sleeves are the same premium sleeves as those used in their race series blocks. Fit your aluminum blocks with the strength of Dart cast iron block sleeves.

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Dart Cylinder Sleeve, Cast Iron, 9.025 in. Deck, 4.000 in. Bore, 5.625 in. Length, Each

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Dart Cylinder Sleeve, Cast Iron, 9.240 in. Deck, 4.125 in. Bore, 5.825 in. Length, LSN, Each

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Dart Cylinder Sleeve, Cast Iron, 9.240 in. Deck, 3.958 in. Bore, 5.825 in. Length, LSN SF 4.240 OD, Each

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Dart Cylinder Sleeve, Cast Iron, BBC 10.400 4.250 in. Bore, 7.000 in. Length + .010, Each

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Dart Cylinder Sleeve, Cast Iron, 9.5 in. Deck, 4.125 in. Bore, 6.100 in. Length, (+.030), Each

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