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4.0L flat-six, 718 GT4, 718 GT4 RS, 718 GTS, 718 Spyder, 9A2 Evo, Akrapovic 718, bench flash, GCC Porsche tuning, NA flat-six, naturally aspirated tuning, PDK tune, Porsche 718, Porsche ECU tune, Porsche exhaust, Porsche Kuwait, Porsche tuning, rev limit raise, track tuning, VarioCam - October 30, 2026

Porsche 718 Cayman GT4 / GTS / Spyder ECU Tuning Guide — 4.0L Flat-Six Stage 1 & 2 Power, Exhaust & GCC Tips (2026)

The Porsche 718 Cayman GT4, GT4 RS, GTS 4.0, and Spyder sit at the top of the mid-engine Porsche hierarchy — each powered by a variation of the 9A2 Evo 4.0-liter naturally aspirated flat-six. Factory output ranges from 394 HP in the GTS 4.0 and base GT4 to 493 HP in the GT4 RS. These are engines designed around high-RPM breathing, mechanical precision, and motorsport DNA. ECU tuning on a naturally aspirated engine is fundamentally different from turbo work — there is no boost pressure to raise. Instead, the gains come from optimizing what the engine already does: breathing, timing,...

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