BMW 540i (2017-2024) Stage 1The BMW 540i offers the perfect blend of luxury and turbocharged punchbut the B58 is capable of much more. WestTuneds Stage 1 ECU calibration unleashes sharper throttle, serious midrange torque, and effortless high speed accelerationwithout touching your daily comfort or OEM safety systems. What Youll Feel: Stronger low end and midrange torqueideal for real world driving Faster throttle response and smoother boost control Pulls harder at high RPM with

MHD WIFI Adapter (MHD Universal only

Safe for OEM emissions systems

8L V8 Twin-Turbo (2013–2023)

Unleash the Beast with Precision Craftsmanship

and AWD drivetrain

Remote tuning available upon ECU access verification

making it truly unique

Fits: 2018-2025 AUDI S4&S5 | West Racing Titanium Exhaust System

and unlock even more of the M156 V8’s naturally aspirated fury—while keeping daily drivability fully intact

Whether you're carving back roads or pushing limits on the circuit

Sharper throttle input and enhanced mid-range torque

Fits: 2017-2025 Porsche Cayenne 9YA| West Racing Stainless Steel Exhaust System