None.
Kansas Statutes
§ 8-1739 Mufflers and noise suppressing systems.
(a) Every vehicle shall be equipped, maintained and operated so as to prevent excessive or unusual noise. Every motor vehicle at all times shall be equipped with a muffler or other effective noise suppressing system in good working order and in constant operation, and no person shall use a muffler cut-out, bypass or similar device.
(b) The engine and power mechanism of every motor vehicle shall be so equipped and adjusted as to prevent the escape of excessive fumes or smoke.
Antique
Available for vehicles at least 35 model years old or older, and not altered or modified from the original manufacturer’s model, except for safety components. Standard antique registration/license plate fee is a one-time $40 fee.
Special Interest
Available for vehicles which are more than 20 years of age and which have not been altered or modified from the original manufacturer's specifications except to assure normal running operation or to meet specific safety inspection requirements on original equipment, or both. Applicants must also own or lease and have registered one or more vehicles for which regular registration fees are paid. There is a one-time $20 fee to defray the cost of issuing the original collector’s Special Interest plate. The registration fee for Special Interest registration is $26 per year, plus property taxes.
Street Rod
Available for vehicles manufactured in 1949 or before that has been altered or modified and may be referred to as a "street rod.” The main component of a street rod that must still be part of the original vehicle is the body, i.e. the body must be all original steel. This is commonly referred to as Detroit steel for American made vehicles of this era. There may be some body work to repair rust and dents, but it must still be repairs to the original steel body. Applicants must also own or lease and have registered one or more vehicles for which regular registration fees are paid. The same fees as for special interest plates apply.
YOM
Vehicles registered as "Antique" may display YOM plates with DMV approval. An antique plate may be used on the front of a vehicle in conjunction with the YOM plate in the rear at the option of the owner.