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Permalink Reply by Gerry Alden on November 10, 2011 at 3:47pm

Yes you are able to measure sound levels.  Subjective tests are valid measurements for the purpose of the guideline.  Exhaust marked or known to be entered into commerce for off road use only, gets the vehicle rejected. Finding this information is trivial.
Bill Groder said:

Ok,, almost 9000 miles this Season,, With A Sticker, With Vance And Hines Long Guns, With The Optional Quiet Baffles... No Ticket Or Ever Stopped....But Then Again I Showed Prudence....

Bill French said:

Gerry Alden said:

Class C 5 Exhaust J. Reject vehicle if the vehicle is equipped with drag or straight pipes or pipes marked with language or symbols such as “for off­road use only”, indicating that the pipe or pipes are not intended for use on a public way

 

Does not Harley Davidson indicate Screaming Eagle exhaust are not intended for use on a public way if the vehicle the pipes are attached to has its noise control configuration modified?   I believe so.  It is an irrelevant point because late model Screaming Eagle exhaust on a late model HD are prohibited from street operation defined by Title 29a 1912 3. Amplification prohibited.  A person may not operate a motor vehicle with an exhaust system that has been modified when the result of that modification is the amplification or increase of noise emitted by the motor above that emitted by the muffler originally installed on the vehicle

 

Gerry, I am not able to measure sound levels for inspection purposes. I dont have the equipment or training. The referenced Screaming Eagles do not seem that loud to me and they pass a good visual inspection per the manual. Most exhaust systems that seem even "a little loud" fail the visual inspection appearing to be straight pipes with baffles.

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