Supertech Nissan SR20DET/RB26 7mm Stem Manganese Bronze .001in OS Exhaust Valve Guide - Set of 12

Made from manganese bronze, these Supertech valve guides are built to handle the heat and wear of the exhaust side in your Nissan SR20DET or RB26 engine. Each guide is precisely machined to a 7mm stem diameter and is .001 inch oversize, ensuring a snug fit for optimal valve sealing and performance. This set includes 12 guides, enough for a complete engine rebuild.

Manganese bronze is a popular choice for exhaust valve guides because it offers good lubricity and wear resistance, helping to prevent premature wear on both the guide and the valve stem. The .001 inch oversize specification is important for engines that have had their valve seats reconditioned or if there's minor wear in the cylinder head bore. This allows for a precise fit that maintains proper valve alignment and prevents excessive oil consumption or blow-by.