Standard Subaru OEM Pistons
We keep a large range of replacement Subaru pistons in stock. Made out of cast alloy these pistons are suitable for most standard applications.
Subaru sizes available are Std, .25mm, .50mm
Applicable models:All (list all the models )
The Cosworth Subaru EJ20 and EJ25 CS600 series Forged Alloy Piston is designed for demanding performance enthusiast. Each assembly is precision built by one of Cosworth’s skilled craftsmen using the finest components to ensure maximum reliable power and performance.
This particular piston is used in all of our Performance applications where optimum strength is required. Reduced cylinder friction minimises drag and therefore increasing HP.
Engine noise is one major complaint when using Forged Pistons in Subaru Horizontally apposed Engines, most manufactures use large Piston to Wall specifications due to the type of Alloy used. Cosworth’s Piston Skirt development allows us to run smaller clearances and in turn reduce piston noise considerably.
Cosworth part number