For all engines 1959-94 with 9mm values, use for both intake and exhaust.

Improve the performance of your race or street performance/street engine with your next valve job

FEATURES

• Both intake and exhaust guides are 5mm shorter than standard. Less protrusion into the port dramatically improves flow.
• The aerodynamic nose of these guides is positioned at minimum protrusion into the port for optimum flow.
  Unlike standard guides, these are tapered for better aerodynamics in the port.
• These custom Manganese Bronz valve guides are self-lubricating, resist wear, and improve guide longevity.

SEALS:

Requires OEM green seals sold separately. INTAKE ONLY.

NOT USING seals on the exhaust side increase ec longevity by allowing more lubrication. Exhaust seals were fitted to street engines in 1978 to gain a minuscule reduction in EPA emissions. Lack of exhaust seals will not make your engine “burn oil”