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, BBC 10.400 4.250 in. Bore, 7.000 in. Length + .030, Each

Dart Cylinder Sleeve, Cast Iron, BBC 10.400 4.250 in. Bore, 7.000 in. Length + .030, Each

$338.86

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Dart Cylinder Sleeve, Cast Iron, BBC 10.200 4.600 in. Bore, 6.770 in. Length +.030, Each

Dart Cylinder Sleeve, Cast Iron, BBC 10.200 4.600 in. Bore, 6.770 in. Length +.030, Each

$338.86

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Dart Cylinder Sleeve, Cast Iron, 8.850 in. Deck, 4.000 in. Bore, 5.425 in. Length, Each

Dart Cylinder Sleeve, Cast Iron, 8.850 in. Deck, 4.000 in. Bore, 5.425 in. Length, Each

$169.72

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Sonnax Line Pressure Plug & Sleeve Kit, Chrysler, Chry A727, 42Rh/Re, 46/47Rh/Re, Each

Sonnax Line Pressure Plug & Sleeve Kit, Chrysler, Chry A727, 42Rh/Re, 46/47Rh/Re, Each

$24.93

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Sonnax Tcc Modulator Sleeve Kit, Ford, 4R44E, 4R55E, 5R44E, 5R55E, Each

Sonnax Tcc Modulator Sleeve Kit, Ford, 4R44E, 4R55E, 5R44E, 5R55E, Each

$87.79

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Dart Cylinder Sleeve, Cast Iron, BBC 10.2 in. Deck, 4.5 in. Bore, 6.77 in. Length, 4.660 O.D., Each

Dart Cylinder Sleeve, Cast Iron, BBC 10.2 in. Deck, 4.5 in. Bore, 6.77 in. Length, 4.660 O.D., Each

$250.42

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