GSC P-D Nissan VK56 Manganese Bronze Exhaust Valve Guide +.001in Oversize OD - Single

Manganese bronze is a solid choice for exhaust valve guides because it handles the heat and wear that comes with the exhaust side of an engine. This particular guide from GSC Power Division is made from that material and is +.001 inch oversize on the outside diameter, meaning it's intended for engines where the original valve guide bore has been opened up slightly to accept a new, larger guide. This is common when rebuilding or modifying engines, especially for performance applications where you might be using larger valves or different valve stem sizes.

When you're rebuilding the top end of a Nissan VK56 engine, getting the valve guides right is crucial for proper valve sealing and longevity. These guides are well-built and designed to fit right into the cylinder head. The +.001 inch oversize OD means you'll need to ensure your cylinder head's valve guide bores are machined to the correct size to accept these guides for a snug, proper fit. This is a single guide, so you'll need to order the correct quantity for your specific engine build.