Enthusiasts played a vital role in altering federal scrappage legislation in 2009 when an amendment was worked into the "Cash for Clunkers" program to spare vehicles 25-years and older from the scrappage heap and expand parts recycling opportunities. Cash for Clunkers operated through voluntary consumer participation, allowing car owners to receive a voucher to help buy a new car in exchange for scrapping a less fuel-efficient vehicle. Vehicle hobbyists eased the program's effects by convincing lawmakers to include a requirement that the trade-in vehicle be a model year 1984 or newer vehicle. This provision helped safeguard older vehicles, which are irreplaceable to hobbyists as a source of restoration parts.
How Loud is Too Loud?
Imagine driving down the road and getting stopped for the modified muffler on your painstakingly-restored Chevy. Now imagine sitting on the shoulder, receiving a citation from local law enforcement, while a stock Ferrari overtakes your car and drives on. This is the scene being played out on state highways across the country, the result of poorly drafted or ineffective state laws and regulations. The laws on the books in these states frequently cite the manufacturer's specifications or a factory installed muffler as the basis on which vehicle exhaust noise is measured.
On this topic, states can generally be divided into two major categories: states with noise standards and states without noise standards. Of the states with a test standard on the books, many ignore guidelines when handing out citations. Most states that have chosen to go the route of setting specifications choose to measure a vehicle's noise by decibels. States that have quantifiable noise standards on the books are shaded red in the map to the right. These standards often go unenforced. One reason these regulations are not enforced is that they are based on an in-use standard-exhaust noise is measured while a vehicle is in motion on the highway. The states that employ these operating standards typically divide vehicles into classes and then set separate standards: one for vehicles while driving on roads with a speed limit of 35 mph or less and a second standard for vehicles driving on roadways with a speed limit greater than 35 mph. The measurements are to be taken while the vehicle is in motion on the road, usually from a distance of 50 feet from the center lane of travel.
Other states choose not to specify a quantifiable noise standard. These states are shown in yellow on the map. Typical language in these states' statutes includes prohibitions on "excessive or unusual noise" from a vehicle's exhaust system. While most motorists believe that exhaust systems should not be used in a way that causes overly loud or objectionable noise, these vague provisions fail to provide a clear and objective standard for those seeking more durable exhaust systems that enhance a vehicle's appearance and increase performance.
Language that effectively limits the use of aftermarket exhausts can be found amongst both yellow and red states. Such language includes sentences such as "no person shall modify the exhaust system of a motor vehicle in any manner which will amplify or increase the noise or sound emitted louder than that emitted by the muffler originally installed on the vehicle." While such language does not specifically prohibit all modification, it does not provide any means of measuring whether a vehicle has been acceptably modified. Such language also negatively affects the aftermarket industry by placing the noise limit authority in the hands of the OEMs and ignores the fact that aftermarket exhaust systems are designed to make vehicles run more efficiently without increasing emissions.