S Ninety Sleeved Block

While sleeved blocks and services are available in the aftermarket, S90 has specifically designed custom performance sleeves. These enhanced Ductile Iron ASTM series sleeves along with enhanced aluminum block guard are what S90 uses to enhance durability and strength, while improving cooling capacity and increased overall bore size possibilities.
Special Notes
High quality Ductile Iron of ASTM series are used as the base for all S90 sleeves. Sleeves are specifically designed to withstand N/A and forced induction applications in mind. Specially designed cooling fins are CNC machined to precision for ventilation. Improved stability and cooling capacity can be achieved with S90's AL6061 T6 aluminum block guard.