SKU: AFR0911
MPN: 0911
The SBC 180cc Street Heads 75cc S/P with Heat Riser (Part No. 0911) represents a purpose-built small-block Chevy cylinder head assembly engineered for street performance and efficiency. These are assembled, ready-to-install heads designed to deliver improved intake flow characteristics and combustion chamber optimization for small-block Chevy engines seeking reliable mid-range power delivery without compromising streetability.
The 180 cubic centimeter intake port volume combined with the 75 cubic centimeter chamber provides a balanced thermal environment ideal for carbureted or naturally aspirated applications. The 2.020-inch intake valve and 1.600-inch exhaust valve sizing supports efficient breathing while maintaining stock-compatible seating and durability. Spring pressure rated at 1.290 inches ensures solid valve control across extended RPM ranges. The straight-plug configuration and integrated heat riser support conventional ignition systems and proper coolant circulation for thermal stability during sustained driving. Both heads ship as a matched pair, aluminum construction, ready for gasket preparation and installation onto the block.
This head assembly targets builders restoring or upgrading street-driven small-block Chevy engines where reliability, flow improvement, and traditional design take priority over radical porting or exotic valvetrain geometry. Hot rodders, classic car builders, and engine rebuilders working within original-specification parameter constraints will find these heads practical for swaps, refreshes, and mild performance upgrades. The Eliminator Street designation reflects compatibility with street-duty powerplants operating at moderate boost or naturally aspirated fuel delivery.
Small-block Chevy heads remain the foundation of countless enthusiast projects. This pair provides verified flow and chamber specs, assembly quality, and proven dimensions — reducing guesswork during engine build planning and allowing confident scheduling around installation timelines.
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