ScienceofSpeed Bronze Engine Valve Guides - NSX, 1991-05

High-performance Magnesium Bronze valve guides. Requires a machine shop to install and hone to fit, typically done as part of a cylinder head job. In our experience, change exhaust valve guides on engines with 90,000 or more or more miles, and intake valve guides at 150,000 or more miles, or when damage occurs.

Sold as a set of 12 for the intake or exhaust.