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Industrial Injection PDM race heads for 4BT engines include a fire ring, CNC-ported valve bowls and exhaust ports, and a milled intake with CNC-ported intake passages. Built for race-oriented 4BT applications, these cylinder heads provide porting and intake milling as specified for performance-focused builds where CNC ported flow and fire ring sealing are required features.
Industrial Injection 4BT Engine Fire Ring/Port Valve Bowls/Exh Port/Mill Intake Off CNC Port Intake
