The Supertech manganese bronze exhaust valve guide set for Toyota FRS / Subaru BRZ FA20D applications is supplied as a set of eight with a 5.5mm stem. These exhaust guides provide the replaceable wearing surface and maintain valve stem alignment for FA20D cylinder heads. Material, stem diameter and the FRS/BRZ FA20D application are stated in the product description.
Supertech Toyota FRS / Subaru BRZ FA20D Manganese Bronze Exhaust Valve Guide 5.5mm Stem - Set of 8