A properly maintained turbocharged engine does not need a spark arrester. Superchargers do not use the exhaust gas but are directly coupled to the engine. Engines equipped with superchargers require a spark arrester.

Do spark arrestors affect performance?

Virtually every aftermarket exhaust pipe comes with a spark arrestor screen, installed or in the box, to allow the pipe to be used in designated areas where the law requires spark arrestors. As a rule, spark arrestors don't have much effect on peak horsepower, but do lessen throttle response.

Can you ride a dirt bike without a spark arrestor?

Any public land or trail must be ridden within the legal requirements. A spark arrestor is one requirement, and a DNR trail sticker is another depending on your state laws and regulations for off-highway motorcycles.