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Alfa Gearbox MAJOR Overhaul Kit 2000 SAVES $245
Alfa Gearbox MAJOR Overhaul Kit 2000 SAVES $245
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Valve Guide 9mm Set (4) Race Exhaust PORTED HEAD
[607-43670-3]
$0.00

FOR PORTED HEADS

Our special made Manganese Bronz Alloy valve guides are designed for full race or street performance use.  They are suitable for both intake and exhaust.

  • The aerodynamic nose of these race intake guides are positioned at minimum protrusion into the port for optimum flow. 
  • For exhaust side these are 5mm shorter than the stock guides. We maintain this length to reduce wear with the softer manganese bronze material.

SEALS:

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

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 important than the small amount of flow increase gained.

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Spruell Motorsport Alfa is your source for performance parts for Alfa Romeo.
We specialize in Alfa Romeo 101, 105 and 115 drive train products for engine, gearbox, differential and wheels.
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