Darton Sleeves Repl Cyl Sleeve BBC 500 Donovan Block 4.492 Bore Feeler Gauge Its X-Tech stretch panels provide

Its X-Tech stretch panels provide excellent ventilation and maneuverability

The 10 Hole Top Air design directs airflow around the top of the helmet for comfort and onto the shield to reduce fogging

Chevrolet: Silverado 1500 09 - 13 6

Performance Racing Series

CNC-formed stainless steel lower bushing support plates

Darton Sleeves Repl Cyl Sleeve BBC 500 Donovan Block 4.492 Bore Feeler Gauge Its X-Tech stretch panels provideProduct Description: Cylinder Sleeve 4. 492 in Bore 7. 250 in Height 4. 702 in OD 0. 105 in Wall Steel Donovan Block Big Block Chevy Sold Individually Darton is a manufacture of engine block sleeves. Using specialized ductile iron, their sleeves fit a variety of engine makes and sizes.