BMW M5 F90 Catless Downpipes + Midpipes — S63TU4 4.4L Twin-Turbo V8 | 2018+
YPG Motorsport catless downpipes and midpipes for the BMW M5 F90 / F90 LCI. Complete replacement of the factory primary and secondary catalytic converters on the S63TU4 engine — four cats removed in total. This is the single biggest bolt-on power gain available for the F90 M5, unlocking the turbo system to breathe freely.
The S63TU4 is a hot-vee design with the turbos sitting inside the valley — backpressure relief from downpipe removal has a direct, immediate effect on spool and power delivery. Expect a significant bump in mid-range torque and a noticeably louder, deeper exhaust note.
- Material: SS304 stainless steel, mandrel-bent, TIG-welded
- Fitment: BMW M5 F90, M5 CS, M5 Competition (2018+)
- Engine: S63TU4 4.4L twin-turbo V8
- Includes: Primary downpipes + secondary midpipes (full decat)
- Power gains: +30–50 WHP (with Stage 2 tune)
- Warranty: Lifetime warranty against manufacturing defects
ECU calibration is required after installation to prevent fault codes and unlock the full power potential. Pair with the Eventuri S63 intake for a complete bolt-on build.
Ships worldwide from YPG Motorsport — free shipping to the GCC, USA, UK, and EU.
These downpipes are the hardware prerequisite for Stage 2 power. Pair them with the matching ECU tune to extract the full gains.
View Stage 2 Tune →
