Illegally Modified Exhausts of Automobiles and Trucks
    Automobiles and trucks are equipped by their manufacturers with muffler systems aimed at reducing the noise emitted from the engine. 

     --The EPA approved noise from both automobiles and trucks is approximately 80dB(A).  
     --The noise created by aftermarket automobile and truck exhausts can rival that of illegally modified motorcycle
exhausts.
     --Noise levels can exceed 120dB(A), or 16 times louder than EPA approved guidelines.

What Do These Aftermarket Exhaust Systems Have in Common
    Because each increases the noise level output of the exhaust higher than the originally installed muffler system and
are higher than EPA guidelines, they are ALL illegal in the State of Hawai'i !! 

    Nonetheless, Hawai'i law enforcement frequently asserts that they are unable to "Prove" they are louder because they lack noise meters to actually "Measure" that these mufflers are louder than those originally installed by the manufacturer.   Therefore, citations for this noise are not issued.  

    Commercial grade noise meters can be purchased for under $500.00.  Surely, even in these times of constrained budgets, HPD could afford to purchase ONE, and use it aggressively!!  Or if $500.00 can't be found, perhaps they could "Borrow" one from the Department of Health.

Marketed as “the most aggressive sound street and strip muffler in XXX's product line.” Manufactured to be the ultimate “Resonance Chamber” This is not a muffler. It is designed to "re-echo" the noise so that when emitted it is amplified many times.

These BIG BORE exhausts are frequently seen on the smaller Scions, Nissan, Toyota, Acura, and similar cars favored by young adults.

REMARKABLY - These illegal aftermarket exhausts often cost more (high hundreds to thousands of dollars) than the car that it is being installed on is worth!! But in an irrational "mine is bigger than yours" world that doesn't seem to matter.