GSC P-D Toyota G16E +.001in Oversize OD Manganese Bronze Exhaust Valve Guide Stopper Style - Single

This GSC Power Division exhaust valve guide stopper is made from manganese bronze, a material known for its good wear resistance and ability to handle heat. It's designed with a stopper style to help control valve movement and is precisely machined to be +.001 inch oversize in outer diameter. This specific sizing is important for engines where the original valve guide bore has worn slightly larger than factory specifications.

Using a manganese bronze stopper guide like this one can help ensure proper valve seating and reduce the risk of valve float at higher RPMs. It's a well-built component intended to restore the correct clearance between the valve stem and the guide, which is crucial for maintaining engine performance and sealing.