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Decat (Cat OFF)
Disable fault codes after catalytic converter removal
After removing the catalytic converter with a sport downpipe, fault codes appear and the MIL turns on. Our Cat OFF software disables the second lambda sensor and catalyst-efficiency monitoring.
Benefits
- No check engine after decat
- Lambda monitoring off
- Compatible with Stage 1 / 2
- Other protections remain
How it works
We disable lambda-2 and catalyst-efficiency monitoring in the ECU file.
For whom
Tuners and owners running a sport downpipe or decat pipe.
Frequently asked questions
Road legal?
Usually no — track use only in most countries.
Visible at inspection?
Visible mechanically; emissions tests may fail.
Order Decat (Cat OFF)?
Upload your original file and receive your Decat (Cat OFF) tuning file back on average within 30 minutes.