Supertech Nissan SR20DET/RB26 7mm Stem Manganese Bronze .001in OS Exhaust Valve Guide - Set of 8

This set includes eight Supertech exhaust valve guides, specifically made for Nissan SR20DET and RB26 engines. These guides are designed to accommodate a 7mm valve stem and are manufactured to a .001 inch oversize specification. They are constructed from manganese bronze, a material known for its good wear resistance and self-lubricating properties, which helps reduce friction and wear on the valve stem and guide.

Using manganese bronze for valve guides is a popular choice in performance engine builds because it handles heat well and offers a solid bearing surface for the valve stem. The .001 inch oversize dimension means these guides are intended for applications where the cylinder head valve guide bores have been machined to accept a slightly larger guide, often done during an engine rebuild or performance modification to ensure a precise fit and proper valve alignment.