The Darton MID Sleeve Kit is available for many series of 4-, 6-, and 8-cylinder import and domestic engines and provides for maximum bore sizes and boost potential.
The benefits of the MID series kits include cast iron performance in an aluminum block, improved block integral strength, improved cooling, “wet sleeve” replaceability, increased horsepower output potential, high boost and horsepower potential, superior oil and compression control, and superior cylinder sealing and ring wear.

Excellent for street or strip applications, Darton’s ductile iron MID sleeve kits offer 130,000 psi of tensile strength and can be installed by your local machine shop.