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Audi C8 RS6 / RS7 4.0T Tuning Guide: Stage 1 vs Stage 2 vs Stage 3 (2026)
Stage 1 to Stage 3 tuning roadmap for the Audi C8 RS6, RS7, and RSQ8 4.0L twin-turbo V8. From 591 HP factory to 1,000+ HP. Downpipe priority, ECU vs TCU tunes, fueling upgrades, and the supporting mods that protect the EA825 V8.
Read moreabout Audi C8 RS6 / RS7 4.0T Tuning Guide: Stage 1 vs Stage 2 vs Stage 3 (2026)
Audi B9 S4 / S5 3.0T Tuning Guide: Stages 1 to 3 (2026)
Complete Audi B9 S4 / S5 3.0T tuning roadmap. Stage 1 (400-450 HP) through Stage 3 (550-620+ HP). Single-turbo TFSI build path, downpipe priority, intake, intercooler, and the supporting mods that protect the car at high boost.
Read moreabout Audi B9 S4 / S5 3.0T Tuning Guide: Stages 1 to 3 (2026)