XONA EA825 4.0T Hybrid Turbo Upgrade

SRM EA825 Xona Hybrid Turbo System

(RS6 / RS7 / SQ7 / SQ8 / RSQ8 / URUS)

Building on the success of our SRM1000 EA824 turbo system, the new SRM EA825 Xona Hybrid brings the same proven performance and reliability to the latest 4.0T platform.

Developed in collaboration with Xona Rotor, this system features a v-band integrated CHRA for OEM-like fitment, combining fast spool, increased airflow, and improved efficiency. When paired with our fueling upgrades, it delivers 1050 WHP (1200 BHP) — real, repeatable performance verified on our in-house development cars. (E85 only with our fuel system.)

So far, SRM is the only performance engineering manufacturer to demonstrate repeatable and consistent results on DI + aftermarket PI Audi 4.0T engines, setting a new benchmark for reliability and calibration precision.

The SRM EA825 Xona Hybrid — a direct-fit, high-output turbo system built for those who demand proven results.

Calibration by C4 Tuning — a veteran tuner with extensive experience using SRM hardware and electronics.