VW EMPI BUG COMPETITION DUAL PORT PERFORMANCE CYLINDER HEAD, 94mm DUAL SPRINGS. EMPI HIGH PERFORMANCE CYLINDER HEADS High Quality special aluminum alloy, permanent mold casting makes for a strong Cylinder head that looks as good as it functions. Features 12mm, 3/4 reach plugs, silicone bronze valve guides and with 40mm / 35.5mm valve seats installed. Special aluminum alloy for strength and stiffness Permanent mold casting 12mm, 3/4 reach plugs moved away from valve seats to eliminate stress cracks Bronze valve guides Valve seats installed (40mm Intake / 35.5mm Exhaust) Increased port wall thickness for porting Exhaust air passages are clear for proper cooling Weldable for custom work Rocker, Exhaust and…