Downpipes, check engine light

Does all the downpipes get u , check engine light ?! if it gets check engine light wat Should u do ?
Warranty?

Most downpipes require a tune/flash to get rid of the cel

Catless DP's require a tune

O2 sensors are a hit or miss here for catless and stock tunes

Some DP's with high flow cats don't.. Most recent is the AA which guarantees no CEL and provides impressive gains with no tune

The Active Autowerke catted downpipe is EPA legal and does not throw any CEL light even if you do not have a tune
https://x-ph.com/active-autowerke-aa-bmw-b58-catted-downpipe-epa-approved/

Warranty should not be affected since downpipe on its own does not put more pressure on the car's components. If anything it reduces pressure on your turbo