GSC P-D Toyota 2JZ Exhaust Valve Guide for 6.6mm Valve Stem .001in Oversize - Single

This listing is for a single GSC Power Division exhaust valve guide designed for Toyota 2JZ engines. It's built to fit a 6.6mm valve stem and is .001 inch oversize, meaning it's a slightly larger diameter than the standard size. This is often used when rebuilding or modifying an engine to ensure a precise fit and proper valve sealing.

Valve guides are critical for keeping the valve stem aligned as it moves up and down within the cylinder head. Proper alignment is essential for the valve to seat correctly against the valve seat, which is key for compression and preventing leaks. This particular guide is made to the correct specifications for the 2JZ engine, a popular choice for performance builds. The .001in oversize helps account for any minor wear in the cylinder head bore or provides a tighter fit for aftermarket valves.