Ported and polished AUDI VW 1.8T 20V 4cyl head. Professionally ported head for street and race applications, for Turbo or NA engines. Bare engine head without valves, valve springs and retainers. Ported, corrected and polished inlet ports Standard head, average intake runner cross area is 1208.4mm. After porting average intake cross area is increased to 1525.3mm. Intake port is increased in all its lengths, all unnecessary sharp corners, steps and edges are corrected to design even and perfect port shape, modified intake near the intake flange. Port shape and design is created based on experience, flow data experiments and direct back-to-back engine tests. Intake port flow increase is in all…