The Supertech manganese bronze exhaust valve guide set for Nissan VR38 applications is supplied as a set of twelve with a 6mm stem. These exhaust guides provide the replacement wearing surface and help maintain valve stem alignment in VR38 cylinder heads. Manganese bronze construction and the explicit VR38 fitment are provided in the product description.
Supertech Nissan VR38 Manganese Bronze Exhaust Valve Guide 6mm Stem - Set of 12