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1971 Alfa 1750 SCCA E-PRODUCTION SPIDER
1971 Alfa 1750 SCCA E-PRODUCTION SPIDER
$39,500.00
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Valve 2000 Race/Street Special Undersize Alfa 9m Stem 38.5m Exhaust Each
[20009EVUS]
$34.50

NO DISCOUT ON CUSTOM VALVES

According to Jim K research undersize 38.5mm 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.

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.

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