In newer model cars, removing the stock muffler will result in a dire consequences and often cause the check engine light to come on. ... If you do decide to delete the muffler in your car, it'll will probably make the CEL light come on. An OBD2 tool will be able to easily clear this warning.

Can a muffler delete ruin your car?

Quick answer – muffler delete will not ruin your car and will not cause any engine damage. Although exhaust leak or rusting may happen if a poor welding job is done. Contrary to popular belief, muffler delete will not gain you any horsepower – all it does is make your exhaust extremely loud.

Will no muffler hurt my engine?

Mufflers are designed to reduce sound, but they do it at the cost of horsepower and fuel efficiency. Removing the muffler can only stand to increase engine performance.