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FULL PREP 1750 BORED TO 1870 (See Details)
FULL PREP 1750 BORED TO 1870 (See Details)
$22,525.00
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Valve Guide 9mm Set (8) Race and Street Performance 1959-94
[607-743760-1]
$82.00

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.

  • Both intake and exhaust guides are 5mm shorter than standard. Less protrusion into the port dramatically improves flow.  
  • The aerodynamic nose of these guides are 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.

WARNING:

 

We do not recommend chopping the guides flush with the port contour.  This practice does not leave enough total guide length to stabilize the lateral thrust of the valve stem.  The precision movement of the valve off the seat is far more inportant than the small amount of flow increase gained.

 

SEALS:

 

Requires OEM green seals sold separately. These seals are furnished in our Reinze gasket sets.

 

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

 

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