ProMaxx Performance Project X Assembled Aluminum Cylinder Heads for Small Block Chevy (185cc)
723-9186S
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185cc Intake Runner
ProMaxx 9186S Project X Aluminum Cylinder Head Features:
- Fully assembled with valve springs, steel valve spring retainers, Viton valve seals, 3/8 in. rocker arm studs, and guide plates
- Valve springs for use with a hydraulic flat-tappet camshaft with a maximum valve lift of .575 in.
- Cast from 356-T6 ultra-smooth aluminum with larger valve spring pockets and runners designed to be both accurate and precise
- Straight spark plug angle uses a 14mm .750 in. reach spark plug such as Autolite AR3934 (sold separately) or equivalent
- One-piece 21-4N stainless steel valves are back-cut and swirl polished to promote airflow and are installed in diamond-honed manganese bronze guides
- Combustion chambers with unshrouded, hardened steel valve seats that feature a competition 5-angle valve job
Specifications:
Are these heads made in U.S.A.?
Who does the flow work on these heads to get those numbers ?
Motor Vehicles
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Tools:
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Electrical Cords
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