The Supertech manganese bronze exhaust valve guide for Nissan VR38 is sized for a 6mm valve stem and intended for that application. The bronze guide surface offers wear resistance to support valve stability in rebuilt or serviced heads. Confirm VR38 engine variant and stem dimensions before fitting to ensure the guide aligns with your cylinder head specifications.
Supertech Nissan VR38 Manganese Bronze Exhaust Valve Guide 6mm Stem