S55 Stage 2 Package

This Stage 2 package for the S55 engine combines the bootmod3 ECU calibration with high-flow VRSF or SLN downpipes to maximise airflow, increase boost efficiency and deliver dramatic performance gains.

Fitment: BMW S55 M Models

Key Features

bootmod3 Stage 2 Calibration

– Increased power and torque output
– Optimised for high-flow downpipes
– Smooth OEM+ drivability

High-Flow Downpipe Upgrade

– Choice of VRSF or SLN
– Decat for maximum flow or sports cat for road use
– Reduced turbo back pressure

Twin-Turbo Efficiency Gains

– Faster boost response
– Stronger midrange and top-end power
– Increased exhaust flow

Benefits

– Major performance increase over stock
– Sharper throttle response
– More aggressive exhaust tone

Fitment

– BMW M2 Competition
– BMW M3 F80
– BMW M4 F82 / F83

Installation Notes

– Smartphone or laptop for flashing bootmod3
– OBD ENET cable required
– Ethernet adapter required
– Professional installation recommended for downpipe
– Replace exhaust gaskets if worn

About bootmod3

bootmod3 is the go-to tuning solution for modern BMW M cars, delivering powerful and reliable ECU performance upgrades.