Here is the updated breakdown incorporating used cylinder head pricing and budgeting for both build pathways: Used B16A Cylinder Head Market Price Summary Before selecting a build path, consider the average market price for a used B16A DOHC VTEC cylinder head (PR3 casting): Head Condition & Completeness Price Range (USD) Price Range (IDR) Bare Head / Core (Shell only, missing cam caps/valvetrain) $300 – $450 Rp 4.500.000 – Rp 7.000.000 Complete Stock Head (OEM cams, valves, springs, rockers, matching caps) $600 – $850 Rp 9.500.000 – Rp 13.500.000 Refreshed / Rebuilt Head (3-angle valve job, new seals, pressure tested) $900 – $1,200 Rp 14.000.000 – Rp 18.500.000 Full Assembly Package (Complete head + intake manifold, distributor, VTEC solenoid) $1,100 – $1,500 Rp 17.500.000 – Rp 24.000.000 1. D16-to-B16 Complete Engine Swap When upgrading from a single-cam D16 to a twin-cam B16A , sourcing a used B16A cylinder head is only one piece of the puzzle. Because D-series and...