The standard bore of the SR20 engine is designed with mass production and costs in mind. The cylinder bore is designed in two sections the top section is aluminum and the lower section is a steel liner. Fine for standard power outputs, but to achieve large power figures this is not suitable. This is due to the top aluminum section of the bore which distorts under high power outputs leading to blown head gaskets as well as damaged piston rings.
TODA Power Liner kit is a one piece liner that gives improved sealing under higher power outputs.
-The kit has been designed to take into account heat expansion found between the liners.
-The material used to make the liner, was chosen for its hardness and low wear rate over similar materials.