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Alfa Gearbox MAJOR Overhaul Kit 2000 SAVES $245
Alfa Gearbox MAJOR Overhaul Kit 2000 SAVES $245
$1,600.00
$1,472.00
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Valve 2000 Race/Street Special Undersize 8x38.5mm 45 degree Exhaust each
[20008EVUS]
$0.00

According to Jim K research undersize exhaust valves make better power than std 40 or oversize 41mm valve by reducing over-scavenging. Several customers have been successful , so we have produced these undersized valves by popular demand without our own testing.

  • The 1mm smaller stem allows better flow.
  • 20% lighter (21 grams) than the 1mm oversize 45x 9mm stem valves. This is worth power since the exhause seat pressure can be reduced.
  • 45 degree seating

For more information on valve sizing and cylinder head performance buy a copy of the Jim Kartalamakis book advertised at the top of this section.

  • NOTE: We can special order any valve size you decide is best for your engine.

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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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