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Pontiac Tri-Power 389 Engine Upgrade - 21st Century Tri-Power - Pontiac...
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Photo 15
Crane Roller Rockers
Pontiac Tri-Power 389 Engine Upgrade - 21st Century Tri-Power - Pontiac Tech
Crane 1.50:1-ratio roller rockers are used to further reduce valvetrain friction. Valvespring installed height is 1.700 inch.
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