The 1.8T 20V turbo - from the Mk4 Golf and Jetta, B5/B6 A4 and Mk1 TT through the modern 1.8T TSI - is one of the most tunable VAG petrol engines, with octane-specific Stage 1 to Stage 3 calibrations.

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Tunes & power for the 1.8T (VAG 20V)

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