We have been unable to source the Aisin clutch masters and are considering these discontinued until we can otherwise secure units. For now our best alternative are the Exedy Units that can be purchased HERE 

Premium AE86 Clutch Master Cylinder

• Supplier of vital hydraulic components to the Japanese automobile industry
• Original equipment standards and quality must be met for hydraulics
• Anodized and Kanizen plating of cylinder bodies strengthens surface ensuring smooth operation of the piston and resists corrosion
• Quick response design reacts to drivers clutch and brake pedal input

Aisin has serious inventory shortages for multiple months of the year.  We may substitute a premium but non-Aisin branded master cylinder if Aisin is not available at the time of your purchase.